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Thread: [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.




  1. #1
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    Default [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.

    Hello. I have been trying to get a stable overclock for quite a while, and every time I try to increase the OC, I get errors in memtest. Right now, I have a rock solid system, but it is fairly gimped. I am aiming for a 400x8 setup with a 2.00B strap, but every time I try and do this, the system stability gets gradually worse over the course of a week, where the hardware won't even be recognized by POST.

    On an ice cold boot (PSU turned off for 30 seconds or more), I would get no errors in memtest for at least six hours. There are 3-5 errors during the second day. During the third day it would increase to 3-5 errors every pass. On the fourth day, 3-5 every test. Fifth day it goes to every minute. Sixth day, every second. If that's not exponential degradation, I don't know what is. Of course, an ice cold reboot resets this procedure.

    Fortunately, my current setup has not had a memtest error at any time. I would love to find out what I would need to do to get it to 400x8. I know it may be difficult, as the P45 REALLY doesn't like it when there are 8 gigs in the system, but I know it might be a possibility.

    Q6600 G0 1.325VID
    EP45-UD3R 1.1 F12
    8GB (4x2GB) Crucial Ballistix PC2-6400 (4-4-4-12 @ 2.0v)
    Corsair VX550W PSU

    The configuration that never has any errors in memtest:
    Code:
    
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: Auto
    CPU Clock Ratio .......................: 9
    CPU Frequency .........................: 3.00GHz (333 x 9)
    
    
    Clock Chip Control 
    Standard Clock Control
    CPU Host Clock Control.................: [Enabled] 
    CPU Host Frequency (Mhz) ..............: 333 
    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....................: [STANDARD]
    Extreme Memory Profile (X.M.P.)........: Disabled
    (G)MCH Frequency Latch.................: [Auto]
    System Memory Multiplier ..............: 2.40B
    Memory Frequency (Mhz) ................: 800
    DRAM Timing Selectable ................: [Manual]
    
    Standard Timing Control
    CAS Latency Time.......................: 5 [5]
    tRCD ..................................: 5 [5]
    tRP'...................................: 5 [5]
    tRAS...................................: 18 [15]
    
    
    
    Advanced Timing Control - All on auto, values reported by bios.
    tRRD...................................: 3
    tWTR...................................: 3
    tWR....................................: 6
    tRFC...................................: 52
    tRTP...................................: 3
    Command Rate (CMD) ....................: 0
    
    Driving Strength Profiles - All on auto, values reported by bios.
    Driving Strength ......................: Auto
    
    Channel A - All on auto, values reported by bios.
    Static tRead Value.....................: 7
     tRD Phase0 Adjustment.................: 0
    tRD Phase1 Adjustment..................: 0
     tRD Phase2 Adjustment ................: 0
     tRD Phase3 Adjustment.................: 0
    Trd2rd(Different Rank).................: 6
    Twr2wr(Different Rank).................: 6
    Twr2rd(Different Rank).................: 5
    Trd2wr(Same/Diff Rank).................: 8
    Dimm1 Clock Skew Control...............:Auto  ps
    Dimm2 Clock Skew Control...............:Auto  ps
    
    Channel B:  See channel A.
    
    Motherboard Voltage Control
    CPU
    CPU Vcore...........1.325v.............: 1.400v
    CPU Termination.....1.200v.............: Auto
    CPU PLL.............1.500v.............: Auto
    CPU Reference.......0.755v.............: Auto
    
    
    MCH/ICH
    MCH Core............1.100v.............: 1.240v
    MCH Reference.......1.760v.............: Auto
    MCH/DRAM Ref........0.900v.............: Auto
    ICH I/O.............1.500v.............: Auto
    ICH Core............1.100v.............: Auto
    
    DRAM
    DRAM Voltage........1.800v.............: 1.900v
    DRAM Termination....0.900v.............: Auto
    Channel A Reference 0.900V.............: Auto
    Channel B Reference 0.900V.............: 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]
    GA-EP45-UD3R
    Q6600 G0 1.325VID @ 3.2GHz
    4x2GB Crucial Ballistix 800
    Corsair VX550W PSU

  2. #2
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.

    CPU Termination (VTT) up to 1.30 - 1.35 might help when using CPU Vcore = 1.40
    With 8GB of memory:
    set DRAM Voltage to its rated 2.00 volt setting
    MCH Core Voltage = 1.26 or 1.28 might be needed

    Have you performed any other stress tests such as LinX or IBT (Intel BurnTest) for 10 passes?
    Prime95 is an excellent test when run for at least 8 - 12 hours.

    You might need to underclock your memory speed somewhat for stability (e.g. 667 - 750MHz).
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
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    SLI @ 16/4 works when running HyperSLI
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    Asus VH242H 24" monitor [1920x1080]
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    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
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    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  3. #3
    Chike is offline Senior Member
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    Default Re: [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.

    Quote Originally Posted by Scuddie View Post
    I know it may be difficult, as the P45 REALLY doesn't like it when there are 8 gigs in the system, but I know it might be a possibility.
    I don't know what P45 likes or not. I recall a user that reported to install 16GB and it worked right away with optimized defaults without a hassle.
    Leavint VTT(CPU Termination) and PLL on auto might unnesessarally overvolt them. Can you post a screen capture of EasyTune->Tuner->Advanced->Voltage tab?
    Have you tried to set 4-4-4-12 timings with your current overclock?

  4. #4
    Lsdmeasap's Avatar
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    Default Re: [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.

    What is auto actually giving you for tRD? Please check with memset, auto/what you see in the BIOS is not always what is used.

    And with your memory, as I have it myself, you may need to use 2.00D instead at 400 or above FSB, which also means you need to set your own tRD and likely this will need to be 8-9

  5. #5
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    Default Re: [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.

    Jim: My CPU overclock is very stable. I once let P95 run for two days without error, but I have not run IBT. I can do this tomorrow, though. On the VTT, that seems a little high according to LSD's suggestion to leave it at 1.2 (on the P45 template). Does this setting affect MCH or memory stability, or is it strictly CPU? When I was able to run my CPU at 3.2 (9 * 355) for stress purposes, I needed a 1.45v VCore and a 1.24v VTT for it to be stable. Would that much of a difference cause memory instability?

    LSD: tRFC and tRD (that's performance level, right?) are 52 and 7 respectively. But many values look considerably different than what was reported in the bios. I don't know if this is relevant or not, but I may as well provide the numbers.

    Memset reported latencies on 333x2.40B strap:
    Timings: 5-5-5-5-15
    Precharge to Activate: 6
    Refresh Cycle Time (tRFC): 52
    Performance Level: 7
    Write to precharge delayed: 14
    Write to Read Delayed (tWTR): 11
    Act to Act Delayed (tRRD): 3
    Read to Write Delay (tRD_WR): 8
    Read to Precharge (tRTP): 5
    All Precharge to refresh delay: 6
    Refresh Period (tREF): 3117
    Command Rate (CR): 2T

    Since Chike suggested to take a look at my voltages, I noticed something peculiar. After I increased VDIMM to 2.0v in the BIOS, ET6 reports Termination, channel a+b reference, and MCH/DRAM reference as 0.9v. I was under the impression that these values were supposed to increase proportionately with VDIMM voltages, and should thus be 1.0v on auto. Is this not the case? And if so, might this be one of the possible sources of my problem?

    Anyway, I'd post screengrabs, but I'm quite busy and unavailable tonight. I may post them tomorrow.

    Please forgive my n00bish and/or hypochondriac-like questions :D.
    GA-EP45-UD3R
    Q6600 G0 1.325VID @ 3.2GHz
    4x2GB Crucial Ballistix 800
    Corsair VX550W PSU

  6. #6
    Chike is offline Senior Member
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    Default Re: [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.

    All about BIOS reference values and ET^ in http://forums.tweaktown.com/gigabyte...-easytune.html
    Basically ET6 shows the reference values as they would be for 1,2v VTT and not actual VTT.
    The same apply to DRAM/MCH Reference, DRAM Termination, and channel references and default 1.8v DRAM Voltage.

  7. #7
    kick's Avatar
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    Default Re: [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.

    performance lvl is tRD yeh and the lower the figure ,the higher the perfomance lvl,or the more performance you are trying to get from the memory.
    I dont like ET dumped it awhile back ,but it is usefull to show what the board is applying/trying for with for auto settings.
    The reference figures will increase if you set them manually , prior to increasing the VDIMM.
    The ref voltages (if setting them yourself) have a general recommendation of not more than 50% of VDIMM.
    Sometimes the divider will be a little off.
    A manually set VDIMM , for me at least allways gives a voltage drop in actual use. I set 2.1 ,I get 2.08 etc.

    tRFC of 52 is a figure I get when setting memory performance to "Turbo" ,normal would be 66.You might get away with 48 depending on the other timings.
    As Chilke posted most of the information is in the stickies above.
    Current Systems:

    Asrock p67 Extreme6.............. Gigabyte EP-45 UD3 ...................... Gigabyte 73 PVM S2
    Intel i5 2500k 4.8ghz................ Intel Q8400 3.8ghz......................... Intel D820 2.8ghz
    Zalman 10x cooler.................... Coolermaster V8............................ HP cooler
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  8. #8
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    Default Re: [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.

    Thank you both for helping to clear that up.

    Anyway, I have set VTT to 1.28v (1.30v refused to boot for some reason), and the ram appears to be much more stable when using 400x2.00D. Not as efficient as I would have hoped, but hopefully an improvement. tRD had to be set to 10 for memtest not to complain about roughly 2000 totally random errors (all of which were 000000ff) in test number three alone. But it's been a day and a half, and no memtest errors have been seen.

    I'll post back in a few days if things start to destabilize.
    GA-EP45-UD3R
    Q6600 G0 1.325VID @ 3.2GHz
    4x2GB Crucial Ballistix 800
    Corsair VX550W PSU

  9. #9
    Chike is offline Senior Member
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    Default Re: [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.

    Are you using the latest BIOS?
    tRD 10 is way high, 8 should be possible, 9 definatly should work.
    It's possible you have a faulty module or memory slot. I would try them as pairs at their rated timings and voltage.

  10. #10
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    Default Re: [EP45-UD3R]Overclocking with 8GB RAM is a nightmare.

    Hmmm... I don't know what to make of that. My VDIMM is now at 2.04v (reported as 2.01v in PC Health Stats and HWMonitor), with loosened timings. tRD at 8 was giving me infinite reboot syndrome, so I found it no surprise that 9 was unstable. This is, of course, only a problem when all modules are in use. I've already tried isolating it to a module, transfer mode, or slot. No problems exist when I'm using 4GB, no matter what kind of configuration I use.


    Some I/O performance does seem to be lacking with 400x2.00D though, like a 2.5 - 3 second delay between the Windows 7 boot sound and the login notification sound, much like how it was with the 333x2.40B configuration. When I used 350x2.00B, it was nearly instantaneous, even though the memory was operating at a lower frequency. I thought it was all due to CPU:DRAM synchronicity. But oh well. Que sera, sera.

    Anyway, I am using the F12 BIOS; the F13e bios that is provided in the sticky doesn't specify 1.0 or 1.1, and the betabios path in the URL kinda indicates it might not be ready yet. I don't know how or if QFlash has gotten any better since the prime of SKT939, but back then, if you updated your firmware to a new revision, you were not going back to an older one without a fresh EEPROM from the factory. So unless this isn't a problem anymore, I'd prefer not to go to F13e.
    GA-EP45-UD3R
    Q6600 G0 1.325VID @ 3.2GHz
    4x2GB Crucial Ballistix 800
    Corsair VX550W PSU

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