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Thread: What would you try next?




  1. #1
    Join Date
    Jun 2009
    Posts
    57

    Default What would you try next?

    Hello.

    I'm working on my first build,
    and have (finally) achieved stability @ stock frequencies:
    9.5x333@3.20B

    I'm now trying to overclock to:
    9.5x400@2.66D

    and feel like I'm this >< close to stability.
    I pass testing in MemTest86+ and Intel Burn;
    but fail a prime95 (blended) test @ 9hrs.

    What would you recommend trying next?
    (I've listed my stable 9.5x333@3.20B settings and last-attempted 9.5x400@2.66D settings at the bottom of this post)

    Also, I do have some general settings questions that maybe someone can answer?

    1. Does MCH Core have any relationship to Vcore? Or are they independent, controlling different things? I'm just wondering if I can leave Vcore and Vtt constant, while I play with MCHcore and DRAMv to try and find a workable "sweet spot"? Or does changing MCH and DRAM affect Vcore/Vtt stability too?

    2. If I have stability with 9.5x333@3.20B, is 9.5x400X2.66D less of a strain on the memory modules because the System Memory Multiplier is lesser? Or is it equal because the resultant DRAM frequency is the same (DDR-1066) or is it more, because of the higher FSB setting (400 vs. 333)? What I'm getting at, is if I find a good sweet spot for MCHcore, DRAMv, timings, tREAD Value, etc. at a certain DRAM frequency, say DDR-1066, then can I leave these settings alone when I try for a higher FSB and lower System Memory Multiplier, and know that they are "good"?

    3. Will enabling Line Load Calibration help any with my DRAM stability? (I believe that my 4x2gb of DRAM is the "weak link" in this equation, more than likely... the e8500 can handle 400FSB easily, right?)

    My stable stock settings:

    Code:
    Motherboard: Model: EP45-UD3P Rev#: 1.1 Bios Version: F8
    Cpu: e8500
    Ram: OCZ, OCZ2RPR10664GK, www.ocztechnology.com/products/memory/ocz_ddr2_pc2_8500_reaper_hpc_edition
    Power Supply Unit: Corsair, HX-620, 620w
    
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : [Auto]
    CPU Clock Ratio ---------------------- : [9]
    Fine CPU Clock Ratio ----------------- : [0.5]
    CPU Frequency ------------------------ : 333
    
    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Enabled]
    CPU Host Frequency (Mhz) --------------: [333Mhz]
    PCI Express Frequency (Mhz) ---------- : [100]
    C.I.A.2 ------------------------------ : [Disabled]
    
    Advanced Clock Control ------- [Press Enter]
    CPU Clock Drive ---------------------- : <<< 800
    PCI Express Clock Drive -------------- : <<< 900
    CPU Clock Skew (ps) ------------------ : <<< 0
    MCH Clock Skew (ps) ------------------ : <<< 0 
    
    DRAM Performance Control
    Performance Enhance ------------------- : [Disabled]
    Extreme Memory Profile --- (X.M.P.) --- : [Disabled]
    (G)MCH Frequency Latch ---------------- : [Auto]
    System Memory Multiplier -------------- : [3.20B]
    Memory Frequency (Mhz) ---------------- : [1066, 1066]
    DRAM Timing Selectable ---------------- : [Manual]
    
    Standard Timing Control
    CAS Latency Time -------- 5 ---------- : [5]
    tRCD  ------------------- 5 ---------- : [5]
    tRP --------------------- 5 ---------- : [5]
    tRAS  ------------------- 15 --------- : [18]
    
    Advanced Timing Control
    tRRD  ------------------- 4 ---------- : [Auto]
    tWTR  ------------------- 4 ---------- : [Auto]
    tWR --------------------- 6 ---------- : [Auto]
    tRFC  ------------------- 72 --------- : [Auto]
    tRTP  ------------------- 4 ---------- : [Auto]
    Command Rate (CMD) ------ 0 ---------- : [Auto]
    
    Driving Strength Profiles
    Driving Strength --------- : Press Enter
    
    Channel A
    Static tRead Value --------------------- : [Auto]
    tRD Phase0 Adjustment ------------------ : [Auto]
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto]  ps
    Dimm2 Clock Skew Control --------------- : [Auto]  ps
    
    Channel B
    Static tRead Value --------------------- : [Auto]
    tRD Phase0 Adjustment ------------------ : [Auto]
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto]  ps
    Dimm2 Clock Skew Control --------------- : [Auto]  ps
    
    Motherboard Voltage Control
    CPU
    Voltage Types------------ Normal -------- Current -----
    Load-Line Calibration ----------------- : [Disabled]
    CPU Vcore --------------- 1.25 -------- : [1.25]
    
    CPU Termination --------- 1.200 ------- : [1.20]
    CPU PLL ----------------- 1.500 ------- : [1.50]
    CPU Reference ----------- 0.755 ------- : [Auto]
    CPU Reference2 ---------- 0.800 ------- : [Auto]
    
    MCH/ICH
    MCH Core ---------------- 1.100 ------- : [1.16]
    MCH Reference ----------- 0.755 ------- : [Auto]
    MCH/DRAM Ref ------------ 0.900 ------- : [Auto]
    ICH I/O ----------------- 1.500 ------- : [1.50]
    ICH Core ---------------- 1.100 ------- : [1.10]
    
    DRAM
    DRAM Voltage ------------ 1.800 ------- : [2.24]
    DRAM Termination -------- 0.900 ------- : [Auto]
    Channel A Reference ----- 0.900 ------- : [Auto]
    Channel B Reference ----- 0.900 ------- : [Auto]
    
    Advanced Settings
    Limit CPUID Max. to 3 ------------------ : [Disabled]
    No-Execute Memory Protect -------------- : [Enabled]
    CPU Enhanced Halt (C1E) ---------------- : [Disabled]
    C2/C2E State Support ------------------- : [Disabled]
    x C4/C4E State Support ----------------- : [Disabled]
    CPU Thermal Monitor 2 (TM2) ------------ : [Enabled]
    CPU EIST Function  --------------------- : [Disabled]
    Virtualization Technology -------------- : [Disabled]
    
    Integrated Peripherals
    Legacy USB Storage Detect  ------------- : [Disabled]
    <based upon="" actual="" cpu-id="" reported="" voltages="" (1.22avg,="" 1.25max),="" this="" is="" probably="" overkill?=""><based upon="" actual="" cpu-id="" reported="" voltages="" (1.22avg,="" 1.25max),="" this="" is="" probably="" overkill?="">

    any help that anyone can offer would be greatly appreciated!

    Thanks.</based></based>
    Last edited by corlay; 06-23-2009 at 12:16 AM.
    case: Gigabyte 'Triton 180'
    power: Corsair 'HX-620'
    motherboard: Gigabyte 'GA-EP45-UD3P' (rev.1.1, F9)
    cpu: Intel 'e8500' (E0)
    cooling: Xigmatek 'HDT-S1283'
    memory: OCZ 'Reaper' 4x2gb (OCZ2RPR10664GK)
    storage: Western Digital 'Black' (500gb)
    video: EVGA 'GeForce' GTX-260
    display: Samsung 'SyncMaster' 2333sw

  2. #2
    Join Date
    Jun 2009
    Posts
    57

    Default Re: What would you try next?

    my current overclock settings, which fail p95 @ ~9hrs.
    (I maxed-out the character limit in my OP...)

    Code:
    Motherboard: Model: EP45-UD3P Rev#: 1.1 Bios Version: F8
    Cpu: e8500
    Ram: OCZ, OCZ2RPR10664GK, www.ocztechnology.com/products/memory/ocz_ddr2_pc2_8500_reaper_hpc_edition
    Power Supply Unit: Corsair, HX-620, 620w
    
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : [Auto]
    CPU Clock Ratio ---------------------- : [9]
    Fine CPU Clock Ratio ----------------- : [0.5]
    CPU Frequency ------------------------ : [400]
    
    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Enabled]
    CPU Host Frequency (Mhz) --------------: [400Mhz]
    PCI Express Frequency (Mhz) ---------- : [100]
    C.I.A.2 ------------------------------ : [Disabled]
    
    Advanced Clock Control ------- [Press Enter]
    CPU Clock Drive ---------------------- : <<< 800
    PCI Express Clock Drive -------------- : <<< 900
    CPU Clock Skew (ps) ------------------ : <<< 0
    MCH Clock Skew (ps) ------------------ : <<< 0 
    
    DRAM Performance Control
    Performance Enhance ------------------- : [Disabled]
    Extreme Memory Profile --- (X.M.P.) --- : [Disabled]
    (G)MCH Frequency Latch ---------------- : [Auto]
    System Memory Multiplier -------------- : [2.66D]
    Memory Frequency (Mhz) ---------------- : [1066, 1066]
    DRAM Timing Selectable ---------------- : [Manual]
    
    Standard Timing Control
    CAS Latency Time -------- 5 ---------- : [5]
    tRCD  ------------------- 5 ---------- : [5]
    tRP --------------------- 5 ---------- : [5]
    tRAS  ------------------- 15 --------- : [18]
    
    Advanced Timing Control
    tRRD  ------------------- 4 ---------- : [Auto]
    tWTR  ------------------- 4 ---------- : [Auto]
    tWR --------------------- 6 ---------- : [Auto]
    tRFC  ------------------- 72 --------- : [Auto]
    tRTP  ------------------- 4 ---------- : [Auto]
    Command Rate (CMD) ------ 0 ---------- : [Auto]
    
    Driving Strength Profiles
    Driving Strength --------- : Press Enter
    
    Channel A
    Static tRead Value --------------------- : [Auto]
    tRD Phase0 Adjustment ------------------ : [Auto]
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto]  ps
    Dimm2 Clock Skew Control --------------- : [Auto]  ps
    
    Channel B
    Static tRead Value --------------------- : [Auto]
    tRD Phase0 Adjustment ------------------ : [Auto]
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto]  ps
    Dimm2 Clock Skew Control --------------- : [Auto]  ps
    
    Motherboard Voltage Control
    CPU
    Voltage Types------------ Normal -------- Current -----
    Load-Line Calibration ----------------- : [Disabled]
    CPU Vcore --------------- 1.25 -------- : [1.275]
    CPU Termination --------- 1.200 ------- : [1.22]
    CPU PLL ----------------- 1.500 ------- : [1.50]
    CPU Reference ----------- 0.755 ------- : [Auto]
    CPU Reference2 ---------- 0.800 ------- : [Auto]
    
    MCH/ICH
    MCH Core ---------------- 1.100 ------- : [1.18]
    MCH Reference ----------- 0.755 ------- : [Auto]
    MCH/DRAM Ref ------------ 0.900 ------- : [Auto]
    ICH I/O ----------------- 1.500 ------- : [1.50]
    ICH Core ---------------- 1.100 ------- : [1.10]
    
    DRAM
    DRAM Voltage ------------ 1.800 ------- : [2.26]
    DRAM Termination -------- 0.900 ------- : [Auto]
    Channel A Reference ----- 0.900 ------- : [Auto]
    Channel B Reference ----- 0.900 ------- : [Auto]
    
    Advanced Settings
    Limit CPUID Max. to 3 ------------------ : [Disabled]
    No-Execute Memory Protect -------------- : [Enabled]
    CPU Enhanced Halt (C1E) ---------------- : [Disabled]
    C2/C2E State Support ------------------- : [Disabled]
    x C4/C4E State Support ----------------- : [Disabled]
    CPU Thermal Monitor 2 (TM2) ------------ : [Enabled]
    CPU EIST Function  --------------------- : [Disabled]
    Virtualization Technology -------------- : [Disabled]
    
    Integrated Peripherals
    Legacy USB Storage Detect  ------------- : [Disabled]
    How does one know to tweak DRAM/MCH or CPU or both?

    One clue that I noticed is that during p95 testing, is a substantial time-lapse develops between the completed tests on each of the 2 cores. Never more than a full 2min. difference in the log, but it probably nears that.
    Last edited by corlay; 06-23-2009 at 12:16 AM.
    case: Gigabyte 'Triton 180'
    power: Corsair 'HX-620'
    motherboard: Gigabyte 'GA-EP45-UD3P' (rev.1.1, F9)
    cpu: Intel 'e8500' (E0)
    cooling: Xigmatek 'HDT-S1283'
    memory: OCZ 'Reaper' 4x2gb (OCZ2RPR10664GK)
    storage: Western Digital 'Black' (500gb)
    video: EVGA 'GeForce' GTX-260
    display: Samsung 'SyncMaster' 2333sw

  3. #3
    Join Date
    Apr 2009
    Location
    J'Habite En Angleterre
    Posts
    2,431

    Default Re: What would you try next?

    With 4 x 2GB I'd try increasing MCH core. It's completely independant of other voltages and is fine to change on its own. I'd try settings from 1.2V up to 1.3V. More isn't necessarily better, so work it up one step at a time.

    Download a copy of CPU-Z. On the main page there's a section called "Revision" if it says E0 then you'll have an easier time overclocking.

    For 3.8GHz, I'd try the following with 4GB RAM, changing MCH voltage as needed if using 8GB:

    Code:
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : [Auto]
    CPU Clock Ratio ---------------------- : [9]
    Fine CPU Clock Ratio ----------------- : [0.5]
    CPU Frequency ------------------------ : [400]
    
    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Enabled]
    CPU Host Frequency (Mhz) --------------: [400Mhz]
    PCI Express Frequency (Mhz) ---------- : [100]
    C.I.A.2 ------------------------------ : [Disabled]
    
    Advanced Clock Control ------- [Press Enter]
    CPU Clock Drive ---------------------- : <<< 800
    PCI Express Clock Drive -------------- : <<< 900
    CPU Clock Skew (ps) ------------------ : <<< 0
    MCH Clock Skew (ps) ------------------ : <<< 0 
    
    DRAM Performance Control
    Performance Enhance ------------------- : [Disabled]
    Extreme Memory Profile --- (X.M.P.) --- : [Disabled]
    (G)MCH Frequency Latch ---------------- : [Auto]
    System Memory Multiplier -------------- : [2.66D] 
    Memory Frequency (Mhz) ---------------- : [1066, 1066]
    DRAM Timing Selectable ---------------- : [Manual]
    
    Standard Timing Control
    CAS Latency Time -------- 5 ---------- : [5]
    tRCD  ------------------- 5 ---------- : [5]
    tRP --------------------- 5 ---------- : [5]
    tRAS  ------------------- 15 --------- : [15]
    
    Advanced Timing Control
    tRRD  ------------------- 4 ---------- : [Auto]
    tWTR  ------------------- 4 ---------- : [Auto]
    tWR --------------------- 6 ---------- : [Auto]
    tRFC  ------------------- 72 --------- : [Auto]
    tRTP  ------------------- 4 ---------- : [Auto]
    Command Rate (CMD) ------ 0 ---------- : [Auto]
    
    Driving Strength Profiles
    Driving Strength --------- : Press Enter
    
    Channel A
    Static tRead Value --------------------- : [8] <--try 7 if you pass Prime.
    tRD Phase0 Adjustment ------------------ : [Auto]
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto]  ps
    Dimm2 Clock Skew Control --------------- : [Auto]  ps
    
    Channel B
    Static tRead Value --------------------- : [8] <--Try 7 if you pass prime
    tRD Phase0 Adjustment ------------------ : [Auto]
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto]  ps
    Dimm2 Clock Skew Control --------------- : [Auto]  ps
    
    Motherboard Voltage Control
    CPU
    Voltage Types------------ Normal -------- Current -----
    Load-Line Calibration ----------------- : [Disabled]
    CPU Vcore --------------- 1.25 -------- : [1.275] <-May need more or less, depends on stepping (revision) and individual CPU (luck)
    CPU Termination --------- 1.200 ------- : [1.24]
    CPU PLL ----------------- 1.500 ------- : [1.57]
    CPU Reference ----------- 0.755 ------- : [Auto] <--Lower CPU Term to 1.2, then enter 0.760V here, then change CPU Term back.
    CPU Reference2 ---------- 0.800 ------- : [Auto] <--Not in UD3P BIOS!
    
    MCH/ICH
    MCH Core ---------------- 1.100 ------- : [1.20V-1.30V]
    MCH Reference ----------- 0.755 ------- : [Auto] <Set this to 0.740V with CPU Term at 1.2V, then change CPU Term back.
    MCH/DRAM Ref ------------ 0.900 ------- : [Auto]
    ICH I/O ----------------- 1.500 ------- : [1.50]
    ICH Core ---------------- 1.100 ------- : [1.10]
    
    DRAM
    DRAM Voltage ------------ 1.800 ------- : [2.26] <--2.1V to 2.3V
    DRAM Termination -------- 0.900 ------- : [Auto]
    Channel A Reference ----- 0.900 ------- : [Auto]
    Channel B Reference ----- 0.900 ------- : [Auto]
    
    Advanced Settings
    Limit CPUID Max. to 3 ------------------ : [Disabled]
    No-Execute Memory Protect -------------- : [Enabled]
    CPU Enhanced Halt (C1E) ---------------- : [Disabled]
    C2/C2E State Support ------------------- : [Disabled]
    x C4/C4E State Support ----------------- : [Disabled]
    CPU Thermal Monitor 2 (TM2) ------------ : [Enabled]
    CPU EIST Function  --------------------- : [Disabled]
    Virtualization Technology -------------- : [Disabled]
    
    Integrated Peripherals
    Legacy USB Storage Detect  ------------- : [Disabled]
    Load line calibration stablises Vcore voltage under load. Usually Vcore droops when the CPU is loaded. LLC prevents this from happening. It has no effect on RAM. If by weak link you mean the actual amount of RAM you have installed then yes, having 8GB can hinder overclocking attempts. Some members of this board however have no problems at all with 8GB and all DIMM slots filled.

    Strap settings and dividers won't stress your RAM more if over all frequency is the same. The MCH however will be more stressed at a 400 FSB than a 333 FSB. That's not to say it'll be unstable. The MCH is capable of 500MHz +, depending on CPU and other components OFC.

    Mentioning the lagging of one core behind the other during prime leads me to elieve it's either Vcore or CPU rermination that needs increasing. Try a bump in CPU Term first, then Vcore if you fail prime. I can re-produce a lag of around 4-5 itterations of FFT with a Vcore that only gets me stable for 6 hours. At correct settings the lag is no more than two itterations. This has been the same on other systems I've overclocked, eg an Athlon X2 3800+ does the same with Vcore set too low.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  4. #4
    Join Date
    Jun 2009
    Posts
    57

    Default Re: What would you try next?

    Thanks for the reply, Psycho!

    Quote Originally Posted by Psycho101 View Post
    With 4 x 2GB I'd try increasing MCH core. It's completely independant of other voltages and is fine to change on its own. I'd try settings from 1.2V up to 1.3V. More isn't necessarily better, so work it up one step at a time.
    Thanks for confirming the "separateness" of MCH Core.
    That helps a lot, when trying to troubleshoot. I'll try increasing MCH Core values, and see what happens.

    Download a copy of CPU-Z. On the main page there's a section called "Revision" if it says E0 then you'll have an easier time overclocking.
    yes, I have the "E0" stepping chip.

    For 3.8GHz, I'd try the following with 4GB RAM,

    Code:
    tRAS  ------------------- 15 --------- : [15]
    Static tRead Value --------------------- : [8] <--try 7 if you pass Prime.
    <set this="" to="" 0.740v="" with="" at="" 1.2v,="" then="" change="" cpu="" term="" back.="">
    </set>
    I noticed that the values you list are more aggressive than my current ones? As FSB increases are "tighter" timings generally more compatable?
    <set this="" to="" 0.740v="" with="" at="" 1.2v,="" then="" change="" cpu="" term="" back.="">
    </set>
    Load line calibration stablises Vcore voltage under load. Usually Vcore droops when the CPU is loaded. LLC prevents this from happening. It has no effect on RAM.
    <set this="" to="" 0.740v="" with="" at="" 1.2v,="" then="" change="" cpu="" term="" back.="">

    again, thanks for confirming the effects of another setting!@

    </set>
    If by weak link you mean the actual amount of RAM you have installed then yes, having 8GB can hinder overclocking attempts. Some members of this board however have no problems at all with 8GB and all DIMM slots filled.
    yes, that's what I meant: overclocking with 4x2gb
    <set this="" to="" 0.740v="" with="" at="" 1.2v,="" then="" change="" cpu="" term="" back.="">
    </set>
    Strap settings and dividers won't stress your RAM more if over all frequency is the same. The MCH however will be more stressed at a 400 FSB than a 333 FSB. That's not to say it'll be unstable. The MCH is capable of 500MHz +, depending on CPU and other components OFC.
    ah.... hence, your advice to start by adjusting only the MCH core. Makes sense...
    <set this="" to="" 0.740v="" with="" at="" 1.2v,="" then="" change="" cpu="" term="" back.="">
    </set>
    Mentioning the lagging of one core behind the other during prime leads me to believe it's either Vcore or CPU termination that needs increasing. Try a bump in CPU Term first, then Vcore if you fail prime. I can re-produce a lag of around 4-5 itterations of FFT with a Vcore that only gets me stable for 6 hours. At correct settings the lag is no more than two itterations.
    <set this="" to="" 0.740v="" with="" at="" 1.2v,="" then="" change="" cpu="" term="" back.="">

    ok, well given that, maybe my "lag" isn't so serious?
    I've never lagged more than one iteration between the 2 cores.

    </set>
    case: Gigabyte 'Triton 180'
    power: Corsair 'HX-620'
    motherboard: Gigabyte 'GA-EP45-UD3P' (rev.1.1, F9)
    cpu: Intel 'e8500' (E0)
    cooling: Xigmatek 'HDT-S1283'
    memory: OCZ 'Reaper' 4x2gb (OCZ2RPR10664GK)
    storage: Western Digital 'Black' (500gb)
    video: EVGA 'GeForce' GTX-260
    display: Samsung 'SyncMaster' 2333sw

  5. #5
    Join Date
    Apr 2009
    Location
    J'Habite En Angleterre
    Posts
    2,431

    Default Re: What would you try next?

    I suggested a tRead of 8 initially because although I'm 99% certain 7 will be stable, it's nice to eliminate a variable.

    For your tRAS setting, I used the specs for your RAM on the OCZ site. Higher (looser) timings give a bit more tollerance for over****ing, but tRAS = 15 is fine at 1066 as your RAM is rated for it. You may actually find it stable up to DDR-1100 or maybe a bit more, if you give it the full 2.3V. I'd use dividers to keep at or under 1066 for now though.

    Once you find your maximum processor overclock, you can play around with RAM dividers to get the highest stable RAM speed. This could be by either using a divider that raises RAM speed, or keeping the same divider, lowering CPU multiplier and pushing the FSB even further.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  6. #6
    Join Date
    Jun 2009
    Posts
    57

    Default Re: What would you try next?

    Well,
    I tried your suggestions;
    but it looks like my 4x2gb of DRAM just won't play nice with a tRAS=15; so I set it back to 18, and continued to tweak and test.

    The best I seem to be able to do is 10.5hrs. in prime95 (blended) before it fails in one core.

    here are the last settings used:

    Code:
    Motherboard: Model: EP45-UD3P Rev#: 1.1 Bios Version: F8
    Cpu: e8500
    Ram: OCZ, OCZ2RPR10664GK, www.ocztechnology.com/products/memory/ocz_ddr2_pc2_8500_reaper_hpc_edition
    Power Supply Unit: Corsair, HX-620, 620w
    
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : [Auto]
    CPU Clock Ratio ---------------------- : [9]
    Fine CPU Clock Ratio ----------------- : [0.5]
    CPU Frequency ------------------------ : [400]
    
    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Enabled]
    CPU Host Frequency (Mhz) --------------: [400Mhz]
    PCI Express Frequency (Mhz) ---------- : [100]
    C.I.A.2 ------------------------------ : [Disabled]
    
    Advanced Clock Control ------- [Press Enter]
    CPU Clock Drive ---------------------- : <<< 800
    PCI Express Clock Drive -------------- : <<< 900
    CPU Clock Skew (ps) ------------------ : <<< 0
    MCH Clock Skew (ps) ------------------ : <<< 0 
    
    DRAM Performance Control
    Performance Enhance ------------------- : [Disabled]
    Extreme Memory Profile --- (X.M.P.) --- : [Disabled]
    (G)MCH Frequency Latch ---------------- : [Auto]
    System Memory Multiplier -------------- : [2.66D]
    Memory Frequency (Mhz) ---------------- : [1066, 1066]
    DRAM Timing Selectable ---------------- : [Manual]
    
    Standard Timing Control
    CAS Latency Time -------- 5 ---------- : [5]
    tRCD  ------------------- 5 ---------- : [5]
    tRP --------------------- 5 ---------- : [5]
    tRAS  ------------------- 15 --------- : [18]
    
    Advanced Timing Control
    tRRD  ------------------- 4 ---------- : [Auto]
    tWTR  ------------------- 4 ---------- : [Auto]
    tWR --------------------- 8 ---------- : [Auto]
    tRFC  ------------------- 72 --------- : [Auto]
    tRTP  ------------------- 4 ---------- : [Auto]
    Command Rate (CMD) ------ 0 ---------- : [Auto]
    
    Driving Strength Profiles
    Driving Strength --------- : Press Enter
    
    Channel A
    Static tRead Value --------------------- : [8]
    tRD Phase0 Adjustment ------------------ : [Auto]
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto]  ps
    Dimm2 Clock Skew Control --------------- : [Auto]  ps
    
    Channel B
    Static tRead Value --------------------- : [8]
    tRD Phase0 Adjustment ------------------ : [Auto]
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto]  ps
    Dimm2 Clock Skew Control --------------- : [Auto]  ps
    
    Motherboard Voltage Control
    CPU
    Voltage Types------------ Normal -------- Current -----
    Load-Line Calibration ----------------- : [Disabled]
    CPU Vcore --------------- 1.25 -------- : [1.275]
    CPU Termination --------- 1.200 ------- : [1.22]
    CPU PLL ----------------- 1.500 ------- : [1.50]
    CPU Reference ----------- 0.760 ------- : [0.772]
    
    MCH/ICH
    MCH Core ---------------- 1.100 ------- : [1.18]
    MCH Reference ----------- 0.760 ------- : [0.772]
    MCH/DRAM Ref ------------ 0.900 ------- : [1.12]
    ICH I/O ----------------- 1.500 ------- : [1.50]
    ICH Core ---------------- 1.100 ------- : [1.10]
    
    DRAM
    DRAM Voltage ------------ 1.800 ------- : [2.24]
    DRAM Termination -------- 0.900 ------- : [1.12]
    Channel A Reference ----- 0.900 ------- : [1.12]
    Channel B Reference ----- 0.900 ------- : [1.12]
    
    Advanced Settings
    Limit CPUID Max. to 3 ------------------ : [Disabled]
    No-Execute Memory Protect -------------- : [Enabled]
    CPU Enhanced Halt (C1E) ---------------- : [Disabled]
    C2/C2E State Support ------------------- : [Disabled]
    x C4/C4E State Support ----------------- : [Disabled]
    CPU Thermal Monitor 2 (TM2) ------------ : [Enabled]
    CPU EIST Function  --------------------- : [Disabled]
    Virtualization Technology -------------- : [Disabled]
    
    Integrated Peripherals
    Legacy USB Storage Detect  ------------- : [Disabled]
    Things I've tried to adjust from the above basis:

    1. I tried adding to MCH core=1.20, but that failed p95 < 1hr. I then reduced it to =1.16, and that really bombed quickly.

    2. I tried adjusting tREAD =9, and then =7; but each failed p95 within < 30min.

    3. I skewed CPU/MCH Reference setting both up and then down one click; and both failed.

    Conclusions: It seems to me that my "sweet spot" for 400FSB are tREAD =8 and MCH core=1.18; and I just need to tweak my other settings around those fixed constants to get things more stable?

    I'm running a test now that uses my above settings, but with DRAM Voltage=2.26. Won't be able to see what's happened until I return home this evening.

    Can anyone offer any other advice to try and gain a little more stability? Should I consider messing with Advanced Clock Control settings, maybe?

    [Update: Recently, when I really got things messed-up while tweaking, I reverted back to "Failsafe Defaults"; and then re-started my tweaking from there. (including manually settings CPU/PCI Clock Drives to 900/800 respectively...) I just read in an older post here, that one should really load "Optimized Defaults" and re-boot before overclocking/tweaking, due to hidden settings that get changed? I'm going to re-start agian by loading optimized defaults and then plug-in my last "best" settings and see if that makes a difference tonight.]
    Last edited by corlay; 06-24-2009 at 11:15 PM.
    case: Gigabyte 'Triton 180'
    power: Corsair 'HX-620'
    motherboard: Gigabyte 'GA-EP45-UD3P' (rev.1.1, F9)
    cpu: Intel 'e8500' (E0)
    cooling: Xigmatek 'HDT-S1283'
    memory: OCZ 'Reaper' 4x2gb (OCZ2RPR10664GK)
    storage: Western Digital 'Black' (500gb)
    video: EVGA 'GeForce' GTX-260
    display: Samsung 'SyncMaster' 2333sw

  7. #7
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: What would you try next?

    Have you tried a little bit more Vcore, Vtt and PLL? If not I would try those as the voltages you have listed are pretty low and could be the thing holding you back. I would try a bit more Vtt and PLL for sure leaving the Vcore if you like

  8. #8
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    Default Re: What would you try next?

    Quote Originally Posted by Lsdmeasap View Post
    Have you tried a little bit more Vcore, Vtt and PLL? If not I would try those as the voltages you have listed are pretty low and could be the thing holding you back. I would try a bit more Vtt and PLL for sure leaving the Vcore if you like
    I did try raising PLL a tick,
    but it made things worse.

    I also was under the understanding that Vtt should track ~0.05 below Vcc? Since CPU-ID is reporting Vcore draw @ 1.22(min.) to 1.25 (max.) under load, I figured that more voltage in these settings wouldn't likely help things?

    But certainly I can give it a try.
    Thanks!
    case: Gigabyte 'Triton 180'
    power: Corsair 'HX-620'
    motherboard: Gigabyte 'GA-EP45-UD3P' (rev.1.1, F9)
    cpu: Intel 'e8500' (E0)
    cooling: Xigmatek 'HDT-S1283'
    memory: OCZ 'Reaper' 4x2gb (OCZ2RPR10664GK)
    storage: Western Digital 'Black' (500gb)
    video: EVGA 'GeForce' GTX-260
    display: Samsung 'SyncMaster' 2333sw

  9. #9
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    Default Re: What would you try next?

    As per your edit to post 6, yes loading optimized would be best, there may be more settings changed than just clock drive.

    CPU term is low. I've seen people stable on 1.20V at 500x8 though. Try a range between 1.24V and 1.28V. Vcor is also a little on the low side, but I remember you do have an E0 stepping. Try a VTT increase first, and if it fails, set a nice in-between VTT of 1.26-1.28 and increase Vcore by two notches, testing again.
    Coolermaster CM 690 II advance Case
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  10. #10
    Join Date
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    Default Re: What would you try next?

    Ok,Guys.
    Thanks for your help so far...

    I tried a bit of your suggestions last night, without much success.

    First I decided to use this as an opportunity to flash my BIOS to the must current version (F9), and then loaded Optimized Defaults. After that I plugged-in all of my last best settings (listed in a previous post in this thread).

    I then pushed CPU Vcore up to 1.28125, CPU termination to 1.24, and CPU PLL to 1.57; leaving MCH core and DRAM Voltage the same at 1.18 and 2.24 respectively.

    First, I tried these settings with stock DRAM timings of 5-5-5-15 and tREAD=8 (all other timing settings on Auto). It passed Memtest86+ and Intel Burn without issue; but failed prime95 blend in ~15min.

    I then tried again, by reverting my DRAM timings back to 5-5-5-18; and it made it a little longer in prime95 to 1.5hr.

    Finally I tried adding a bit more to MCH Voltage and made it 1.22. This also failed pretty quickly in p95.

    Question #1: Is it safe to say that if I add voltages and things get worse, that I've found a workable ceiling of sorts? Or is there some sort of threshold that I need to cross, by adding even more voltage, and then things will start to get better?

    Question #2: I see that in prime95 one can setup a custom test configuration? With all of this DRAM that I have, should I maybe test with only, say, 80% of the total available (6gb). If it makes it a full 24hr. that way; would that, at least, help rule out if my issue is DRAM timings/voltages, Northbridge/chipset voltages, or CPU voltages?

    Thanks!
    case: Gigabyte 'Triton 180'
    power: Corsair 'HX-620'
    motherboard: Gigabyte 'GA-EP45-UD3P' (rev.1.1, F9)
    cpu: Intel 'e8500' (E0)
    cooling: Xigmatek 'HDT-S1283'
    memory: OCZ 'Reaper' 4x2gb (OCZ2RPR10664GK)
    storage: Western Digital 'Black' (500gb)
    video: EVGA 'GeForce' GTX-260
    display: Samsung 'SyncMaster' 2333sw

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