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Thread: Stable E8400 OC - stock voltages




  1. #241

    Default Re: Stable E8400 OC - stock voltages

    Quick question off the beaten path. Is running Win 7 or Vista Ult (64 bit) okay to get a way with or are there too many issues trying to find drivers and programs, etc.
    Gigabyte EP45-UD3R (rev 1.1, bios F12), E8400 @ 3.83Ghz, Xigmatek S1283, 2x2Gb OCZ2RPR11504GK Reaper PC2-9500 HPC 1150Mhz, PNY 9600 GSO 768MB PCI-e OC , CoolerMaster 590, WinXP SP3 32bit and Win7 Pro 64 Bit (swappable HDD's via Icy Dock)


  2. #242

    Default Re: Stable E8400 OC - stock voltages

    Following the steps 1 - 12:

    • 1.3375v - GFlops 25.5013/25.0762
    • 1.325v - GFlops 25.444/25.304
    • 1.31875v - GFlops 25.3887/24.9950
    • 1.3125v - GFlops 25.5133/25.0378
    • 1.30625v - GFlops 25.3820/24.8367
    • 1.30v - GFlops 25.5642/24.916
    • 1.29375v - GFlops 25.333/25.4809
    • 1.2875v - GFlops 25.1422/25.5578
    • 1.82125v - GFlops 25.43/25.5699
    • 1.275v - GFlops 25.5712/25.4286
    • 1.26875v - Rebooted 1st attempt
    • 1.26875v - 25.5630 only no second reading but passed test on 2nd attempt
    • 1.26875v - Rebooted 3rd attempt


    Aren't these GFLops low compared to yours Psycho101? Thought your results were from a E7** CPU.

    The temps tended to hang around the upper 50C range. Rarely hitting 62 or 63 in the first few tests. It would hit 61 occasionally on most of the tests. 1.275v stayed in upper 50C range but I don't believe it hit 60C.

    So based on your steps 11 and 12 the last VCore reading showing a normal GFlops would have to be 1.275v. 1.26875v caused a reboot so no real reading on GFlops it seems. Then step 12 "add a single click of VCore" would put it at 1.28125v. About 41C at idle or basic PC use (surfing web).

    So, is it best to do Prime overnight at this point or tweak any OC settings in the BIOS first? The Memory Freq is at 890 and the SMM is at 2.00D. Below are my current settings and further down is what I had been using since early this year.

    Current settings below:


    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio .......................: [ 9]
    Fine CPU Clock Ratio...................: +0.0
    CPU Frequency .........................: 4.005GHz

    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control.................: [Enabled]
    CPU Host Frequency (Mhz) ..............: 445Mhz
    PCI Express Frequency (Mhz) ...........: 100

    C.I.A.2 ...............................: [Disabled]

    Advanced Clock Control [Press Enter]
    CPU Clock Drive........................: 800mV
    PCI Express Clock Drive................: 900mV
    CPU Clock Skew (ps)....................: 0ps
    MCH Clock Skew (ps)....................: 0ps

    DRAM Performance Control
    Performance Enhance....................: [STANDARD]
    Extreme Memory Profile (X.M.P.)........: [Disabled]
    (G)MCH Frequency Latch.................: Auto
    System Memory Multiplier ..............: 2.00D
    Memory Frequency (Mhz) ................: 890
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time.......................: 5
    tRCD ..................................: 6
    tRP'...................................: 6
    tRAS...................................: 18

    Advanced Timing Control
    tRRD...................................: 5
    tWTR...................................: 5
    tWR....................................: 8
    tRFC...................................: 54
    tRTP...................................: 5
    Command Rate (CMD) ....................: 2

    Driving Strength Profiles
    Driving Strength ......................: 1066

    Channel A
    Static tRead Value.....................: 11
    tRD Phase0 Adjustment..................: [Auto] 0
    tRD Phase1 Adjustment..................: [Auto] 0
    tRD Phase2 Adjustment .................: [Auto] 0
    tRD Phase3 Adjustment..................: [Auto] 0

    Trd2rd(Different Rank).................: [Auto] 6
    Twr2wr(Different Rank).................: [Auto] 6
    Twr2rd(Different Rank).................: [Auto] 5
    Trd2wr(Same/Diff Rank).................: [Auto] 8

    Dimm1 Clock Skew Control...............: [Auto]
    Dimm2 Clock Skew Control...............: [Auto]
    DDR Write Training.....................: [Auto]

    Channel B
    Static tRead Value.....................: 11
    tRD Phase0 Adjustment..................: [Auto] 1 (odd as it's not 0 and set to auto)
    tRD Phase1 Adjustment..................: [Auto] 0
    tRD Phase2 Adjustment .................: [Auto] 0
    tRD Phase3 Adjustment..................: [Auto] 0

    Trd2rd(Different Rank).................: [Auto] 6
    Twr2wr(Different Rank).................: [Auto] 6
    Twr2rd(Different Rank).................: [Auto] 5
    Trd2wr(Same/Diff Rank).................: [Auto] 8

    Dimm1 Clock Skew Control...............: [Auto]
    Dimm2 Clock Skew Control...............: [Auto]
    DDR Write Training.....................: [Auto]

    Motherboard Voltage Control
    Voltage Type...........................: [Manual]
    CPU---------------------Normal-----------Current
    Load Line Calibration..................: [Disabled]
    CPU Vcore...............1.25000V.......: 1.28125v (rebooting now to set this value in BIOS)
    CPU Termination.........1.200V.........: 1.24V
    CPU PLL.................1.500V.........: 1.57v
    CPU Reference...........0.760V.........: [Auto]

    MCH/ICH
    MCH Core................1.100V.........: 1.24v
    MCH Reference...........0.760V.........: 0.785v +-
    MCH/DRAM Reference......0.900V.........: [Auto]
    ICH I/O.................1.500V.........: 1.570V
    ICH Core................1.100V.........: 1.200V

    DRAM
    DRAM Voltage............1.800V.........: 2.200V
    DRAM Termination........0.900V.........: [Auto]
    Channel A Reference.....0.900V.........: [Auto]
    Channel B Reference.....0.900V.........: [Auto]
    __________________

    Limit CPUID Max3 - Disabled
    No Exec MemProtect - Enabled
    CPU Enh Halt C1E - Disabled
    C2/C2E State Sup - Disabled
    C4/C4E State Sup - Disabled
    CPU Therm Monitor - Enabled
    CPU EIS Function - Disabled
    Virtual Tech - Enabled

    The past several months I had been using (in case this helps along the way):

    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio .......................: [ 9]
    Fine CPU Clock Ratio...................: +0.0
    CPU Frequency .........................: 3.83GHz

    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control.................: [Enabled]
    CPU Host Frequency (Mhz) ..............: 426Mhz
    PCI Express Frequency (Mhz) ...........: 100

    C.I.A.2 ...............................: [Disabled]

    Advanced Clock Control [Press Enter]
    CPU Clock Drive........................: 800mV
    PCI Express Clock Drive................: 900mV
    CPU Clock Skew (ps)....................: 0ps
    MCH Clock Skew (ps)....................: 0ps

    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) ................: 1022
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time.......................: 5
    tRCD ..................................: 6
    tRP'...................................: 6
    tRAS...................................: 18

    Advanced Timing Control
    tRRD...................................: 5
    tWTR...................................: 5
    tWR....................................: 8
    tRFC...................................: 54
    tRTP...................................: 5
    Command Rate (CMD) ....................: 2

    Driving Strength Profiles
    Driving Strength ......................: 1066

    Channel A
    Static tRead Value.....................: 8
    tRD Phase0 Adjustment..................: [Auto] 0
    tRD Phase1 Adjustment..................: [Auto] 0
    tRD Phase2 Adjustment .................: [Auto] 0
    tRD Phase3 Adjustment..................: [Auto] 0

    Trd2rd(Different Rank).................: [Auto] 6
    Twr2wr(Different Rank).................: [Auto] 6
    Twr2rd(Different Rank).................: [Auto] 5
    Trd2wr(Same/Diff Rank).................: [Auto] 8

    Dimm1 Clock Skew Control...............: [Auto]
    Dimm2 Clock Skew Control...............: [Auto]
    DDR Write Training.....................: [Auto]

    Channel B
    Static tRead Value.....................: 8
    tRD Phase0 Adjustment..................: [Auto] 1 (odd as it's not 0 and set to auto)
    tRD Phase1 Adjustment..................: [Auto] 0
    tRD Phase2 Adjustment .................: [Auto] 0
    tRD Phase3 Adjustment..................: [Auto] 0

    Trd2rd(Different Rank).................: [Auto] 6
    Twr2wr(Different Rank).................: [Auto] 6
    Twr2rd(Different Rank).................: [Auto] 5
    Trd2wr(Same/Diff Rank).................: [Auto] 8

    Dimm1 Clock Skew Control...............: [Auto]
    Dimm2 Clock Skew Control...............: [Auto]
    DDR Write Training.....................: [Auto]

    Motherboard Voltage Control
    Voltage Type...........................: [Manual]

    CPU---------------------Normal-----------Current

    Load Line Calibration..................: [Disabled]
    CPU Vcore...............1.25000V.......: 1.28750V
    CPU Termination.........1.200V.........: 1.200V
    CPU PLL.................1.500V.........: 1.500V
    CPU Reference...........0.760V.........: [Auto]

    MCH/ICH
    MCH Core................1.100V.........: 1.220V
    MCH Reference...........0.760V.........: [Auto]
    MCH/DRAM Reference......0.900V.........: [Auto]
    ICH I/O.................1.500V.........: 1.500V
    ICH Core................1.100V.........: 1.100V

    DRAM
    DRAM Voltage............1.800V.........: 2.200V
    DRAM Termination........0.900V.........: [Auto]
    Channel A Reference.....0.900V.........: [Auto]
    Channel B Reference.....0.900V.........: [Auto]

    Limit CPUID Max3 - Disabled
    No Exec MemProtect - Enabled
    CPU Enh Halt C1E - Disabled
    C2/C2E State Sup - Disabled
    C4/C4E State Sup - Disabled
    CPU Therm Monitor - Enabled
    CPU EIS Function - Disabled
    Virtual Tech - Disabled
    Last edited by SBMongoos; 10-25-2009 at 12:39 AM.

  3. #243

    Default Re: Stable E8400 OC - stock voltages

    Quote Originally Posted by Chike View Post
    Latest version of all programs can be found in the programs sticky. Note that different versions may give different results for the same settings so they may not be comparable.
    Prime95 will run workers for all cores automatically, no need to run multiple instances.
    That was Stress Prime 2004 not Prime95. In Stress Prime you have to choose a core and then run another instance to choose the other core, etc.
    Gigabyte EP45-UD3R (rev 1.1, bios F12), E8400 @ 3.83Ghz, Xigmatek S1283, 2x2Gb OCZ2RPR11504GK Reaper PC2-9500 HPC 1150Mhz, PNY 9600 GSO 768MB PCI-e OC , CoolerMaster 590, WinXP SP3 32bit and Win7 Pro 64 Bit (swappable HDD's via Icy Dock)


  4. #244

    Default Re: Stable E8400 OC - stock voltages

    Quote Originally Posted by Psycho101 View Post
    I wasn't belittling any suggestions made to the OP. I did however think that using IBT would be easier than just using prime. I know it's another program to use, but it'll save alot of adjusting in the long run. Unlike Prime95, this should also truely let you isolate the CPU Vcore first. Any prime failures after are then much more likely to be because of RAM/MCH.

    I also wasn't referring to you about BIOS templates. You have said in all your posts (as do most here) that they are suggestions only.

    Note that for even more ease, the Vcore after each run of IBT (3 runs = ~1.5 min at ~26-28GFlops) you can use ET6 to increase the voltage step by step or decrease step by step depending on findings. I would suggest setting Vcore nice and high but not dangerously slow to get the GFLops value for the current clock speed to compare with all lower voltage runs.

    BoombasticSloth is correct. Vdrop = difference between what you set in the BIOS and what you see in CPU-Z at idle.

    VDroop = difference between idle reading and 100% CPU load reading.

    Example: PC 1's CPU Vcore is set in the BIOS to 1.3625V. When booted to Windows, CPU-Z shows 1.349V. This is VDrop and is acceptable.

    When the user loads PC 1's CPU using Prme/IBT the CPU-Z voltage drops further, to 1.322V. Again, this is normal.

    LLC will not stop VDroop (difference between BIOS settings and idle) but will dramatically reduce VDroop at load.

    Example, the same PC now has LLC on . The CPU-Z voltage at idle is still 1.349V. When loaded, the VCore stays exactly the same at 1.349V. On occasion some PC's Vcore may oscillate between two values with LLC on. This is nothing to worry about. The PC in the example may load at a voltage that changes between 1.349V and 1.342V once every second/CPU-Z refresh interval.

    I know it can get confusing and sometimes be like walking through treacle as to what to do next etc.

    Here is a nice clear to do list.

    1. Download IBT.
    2. Open it
    3. Open ET6
    4. Open CoreTemp/RealTemp
    5. Using ET6, set core voltage a couple of clicks higher than it currently is.
    6. Watching the temps, run 2 passes of IBT on Standard.
    7. Write down the GFLops values given by the program
    8. Set Vcore to the original value
    9. Again run IBT and compare GFlops values. If they are around the same (within ~1.5GFlops) procede to decrease Vcore a click and repeat IBT
    10. Repeat this until you see a noticable fall in GFlop value.
    11. Restore the lowest Vcore value that gave you a "normal" GFlops value.
    12. Add a single click of Vcore


    Note down the exact Vcore value you are now using and restart the machine. Enter this Vcore value manually in the BIOS before testing any further.

    Now test over night with Prime set to Blend, all standard settings should be fine.
    Any thoughts on post #242?

    Also, my starting point on this was 3.83Ghz. I did not start at the 3Ghz that this CPU based.
    Gigabyte EP45-UD3R (rev 1.1, bios F12), E8400 @ 3.83Ghz, Xigmatek S1283, 2x2Gb OCZ2RPR11504GK Reaper PC2-9500 HPC 1150Mhz, PNY 9600 GSO 768MB PCI-e OC , CoolerMaster 590, WinXP SP3 32bit and Win7 Pro 64 Bit (swappable HDD's via Icy Dock)


  5. #245

    Default Re: Stable E8400 OC - stock voltages

    For whatever it's worth I tried the 4.005Ghz settings and then updated the BIOS to F11. The PC didn't like it. So instead of messing around with tweaking I switched back to F7.

    Odd though as I'm now getting this error when I go into Windows:

    Last edited by SBMongoos; 10-25-2009 at 04:55 AM.
    Gigabyte EP45-UD3R (rev 1.1, bios F12), E8400 @ 3.83Ghz, Xigmatek S1283, 2x2Gb OCZ2RPR11504GK Reaper PC2-9500 HPC 1150Mhz, PNY 9600 GSO 768MB PCI-e OC , CoolerMaster 590, WinXP SP3 32bit and Win7 Pro 64 Bit (swappable HDD's via Icy Dock)


  6. #246
    Join Date
    May 2009
    Location
    Canada
    Posts
    178

    Default Re: Stable E8400 OC - stock voltages

    I hope your not flashing your bios when overclocked unless your absolutely certain that it is rock solid stable. Even then, I would not flash a bios when oc'ed. IMO.
    1) Gigabyte EP45-UD3P (rev 1.1, bios F9) E8400 @445x9@1.2625v bios, TRUE 120, Scythe UltraKaze 44cfm, 4x2gb GSkill 8500, Visiontek 3870, Corsair TX850, Antec 900, Win7-64 Home.
    2) Gigabyte EP45-UD3P (rev 1.1, bios F9) E8400 @500x8.5@1.2875v bios, TRUE 120, Schythe UltraKaze 44 cfm, 4x2gb Buffalo FireStyx 8500, XFX 5770, Corsair AX850, CM Scout, WinXP Pro/Win 7-64 Home.
    3) Gigabyte P55A-UD4P (rev 1.0, bios F5) i5 750 @190x20@1.30625v bios, CM Hyper 212+, 4x2gb G.Skill Ripjaw 1600, 7900GS, Corsair TX750, CM Scout, Win7 Pro-64.
    4) Asus P8Z68-V Pro (bios 0801), i5-2500K @44x100@1.248v cpuz, Megahalem rev.B, 4x4gb GSkill Sniper 1600, Corsair AX850, Antec 902, Corsair Performance 3 128GB, Win7-64 Home.


  7. #247
    Join Date
    Apr 2009
    Location
    J'Habite En Angleterre
    Posts
    2,431

    Default Re: Stable E8400 OC - stock voltages

    As far as I know, F11 is for EP45-UD3R not EP45-UD3P.

    The latest UD3P BIOS is F10f.
    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

  8. #248

    Default Re: Stable E8400 OC - stock voltages

    Quote Originally Posted by Psycho101 View Post
    As far as I know, F11 is for EP45-UD3R not EP45-UD3P.

    The latest UD3P BIOS is F10f.
    Actually, I have the EP45-UD3R v1.1. Need to change that in my signature.

    In any case did you get to check out my post# 242.
    Gigabyte EP45-UD3R (rev 1.1, bios F12), E8400 @ 3.83Ghz, Xigmatek S1283, 2x2Gb OCZ2RPR11504GK Reaper PC2-9500 HPC 1150Mhz, PNY 9600 GSO 768MB PCI-e OC , CoolerMaster 590, WinXP SP3 32bit and Win7 Pro 64 Bit (swappable HDD's via Icy Dock)


  9. #249
    Join Date
    Apr 2009
    Location
    J'Habite En Angleterre
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    2,431

    Default Re: Stable E8400 OC - stock voltages

    The 40+ GFlops screen-shots etc are from a Quad core @ 3.4GHz. For a dual core, your figures are about right.

    I'd run Prime 95 over night now on blend. I do have a feeling that you may need 1.26-1.30V CPU termination and also need to adjust MCH Ref to = 0.740 or 0.720 when CPU Term is 1.2V.

    You should also be able to get away with using 2.4B or 2.5A to bring your RAM up a little. I recommend getting stable at 4GHz with 2.4B. This will give you room to increase FSB up to a max of ~480. You should get up to ~465*9 with a RAM speed of 1116, but concentrate on getting 445*9 stable first. Having 445*9 100% stable makes it a bit easier to increase FSB and tweak to regain stability as you should now have an idea of what's needed for stability.

    Prime exactly what you have in the first template in post # 242 except change to 2.4B. If you get a fail before 8 hours, follow the MCH Ref and VTT suggestions above, testing each time to see if the system is stable longer. I'd look to settle at somewhere between your current 4GHz and 4.2GHz.
    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

  10. #250

    Default Re: Stable E8400 OC - stock voltages

    Quote Originally Posted by Psycho101 View Post
    The 40+ GFlops screen-shots etc are from a Quad core @ 3.4GHz. For a dual core, your figures are about right.

    I'd run Prime 95 over night now on blend. I do have a feeling that you may need 1.26-1.30V CPU termination and also need to adjust MCH Ref to = 0.740 or 0.720 when CPU Term is 1.2V.

    You should also be able to get away with using 2.4B or 2.5A to bring your RAM up a little. I recommend getting stable at 4GHz with 2.4B. This will give you room to increase FSB up to a max of ~480. You should get up to ~465*9 with a RAM speed of 1116, but concentrate on getting 445*9 stable first. Having 445*9 100% stable makes it a bit easier to increase FSB and tweak to regain stability as you should now have an idea of what's needed for stability.

    Prime exactly what you have in the first template in post # 242 except change to 2.4B. If you get a fail before 8 hours, follow the MCH Ref and VTT suggestions above, testing each time to see if the system is stable longer. I'd look to settle at somewhere between your current 4GHz and 4.2GHz.
    Thanks so much for your help! I'll get it on it and then get back to you soon.
    Gigabyte EP45-UD3R (rev 1.1, bios F12), E8400 @ 3.83Ghz, Xigmatek S1283, 2x2Gb OCZ2RPR11504GK Reaper PC2-9500 HPC 1150Mhz, PNY 9600 GSO 768MB PCI-e OC , CoolerMaster 590, WinXP SP3 32bit and Win7 Pro 64 Bit (swappable HDD's via Icy Dock)


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