I7 920 D0 OC'ing at 3.9, Can't find low + stable vcore

Hello. I'm trying to OC at cpu to 3.9ghz with the lowest vcore possible being steady. I've tried so many different configurations and tweaked the settings and seems like I am getting no where after hrs of playing around with settings.

i7 920 D0 (Stepping 5)
EVGA x58 SLI LE
1000w corsair PSU
12GB Corsair Dominator. (6x2GB (PC3-12800) DDR3 1600 @ 1562 Mhz )
Vista 64bit (Upgrading soon to Windows 7 64bit)
2 X EVGA 285 2gb sli (Upgrading soon to 1 card only)

I cannot even get it to load into windows without having it atleast to 1.45v on the cpu vcore. Any suggestions? Pictures follow below. Thanks.

http://img19.imageshack.us/img19/8876/dscf3808r.th.jpg

http://img18.imageshack.us/img18/4554/dscf3809g.th.jpg

http://img196.imageshack.us/img196/4008/dscf3810i.th.jpg

http://img46.imageshack.us/img46/9941/dscf3811w.th.jpg
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More about find stable vcore
  1. 2.66 to 3.9 is a quite big OC.

    have you tried something like a 3.3ghz OC (you dont just go straight for the top)

    http://www.clunk.org.uk/forums/overclocking/22106-core-i7-overclocking-guide-beginners.html

    thats a guide for OCing the i7 920

    and i do very much hope you are not using the stock cooler.
  2. HugoStiglitz said:
    2.66 to 3.9 is a quite big OC.

    have you tried something like a 3.3ghz OC (you dont just go straight for the top)

    http://www.clunk.org.uk/forums/overclocking/22106-core-i7-overclocking-guide-beginners.html

    thats a guide for OCing the i7 920

    and i do very much hope you are not using the stock cooler.



    I'd like to stick at 3.9Ghz. I know it is very well possible. I know every chip/unit is different, but I've seen many 920 D0's at 4.0Ghz with low voltages. I tried following that guide recently and it hasn't helped much in my opinion.

    I'm using the Zalman CNPS10X CPU cooler so temperatures are fine and are not a concern.

    Any other suggestions would be appreciated.

    Thanks
  3. Your images are blocked at work.

    Don't forget that your memory voltage will also need to be increased when you're OCing your CPU.
  4. I have my i7 920 OC to 3.8 ghz. It was the most stable on Air at that clock. I think my vcore is in the 1.3x.

    Just for reference: I OC from 2.66 to 3.8ghz in one run, been running for 2 weeks now without it ever going over 65 degrees Celsius at 100% load.
  5. I tweaked around with the settings some more an have it stable at 3.8ghz (181 BCLK) and the lowest I got on the vcore was 1.4v which in my opinion is still too high for a 3.8 oc.

    Updated specs:

    CPU: i7 920 D0 (Stepping 5, Batch #3923a87)
    MOBO: EVGA x58 SLI LE
    PSU: HX 1000w
    Ram: 12GB Corsair Dominator. (6x2GB (PC3-12800) DDR3 1600 @ 1450 Mhz ) (8-8-8-24 Timing)
    GPU: Galaxy GTX 580 1GB
    OS: Windows 7 64-bit


    I'd still like to bump up to 3.9ghz. Does anyone have suggestions what else to tweak to get my vcore lower?

    Thank you.

    Updated pics follow below:

    http://img38.imageshack.us/img38/7926/dscf3812c.jpg

    Uploaded with ImageShack.us

    http://img23.imageshack.us/img23/2084/dscf3814q.jpg

    Uploaded with ImageShack.us

    http://img545.imageshack.us/img545/5496/dscf3815j.jpg

    Uploaded with ImageShack.us


    http://img526.imageshack.us/img526/401/dscf3816t.jpg

    Uploaded with ImageShack.us
  6. Have u ever try BLCK 200Mhz Ratio x19?

    BTW, i saw your 'Turbo Mode' Function was enabled. It could be the cause of your O.C failed. As the Ratio would be turbo to x21 after the cpu has been 100% loaded.
  7. AXDA2500 said:
    Have u ever try BLCK 200Mhz Ratio x19?

    BTW, i saw your 'Turbo Mode' Function was enabled. It could be the cause of your O.C failed. As the Ratio would be turbo to x21 after the cpu has been 100% loaded.


    Thanks for the reply. I did try it once previously, but didn't tweak the settings enough to try and see a stable cpu with no BSOD's. I'll give it another shot and post my results again soon.

    As of right now I've been able to get about 90% stable on my current settings. I can run Intel Burn Test 30 runs and it is successful and on other end sometimes it only finishes 4 passes and gives me an "unstable" error. Any who, these are my current settings. Running okay as of right now at about 3.85ghZ. Still looking to push to a stable 4.0!
    
    
    Frequency Control 
    CPU Clock Ratio ( 20X )                                                                                         
    CPU Host Frequency (Mhz) ( 184 BSLK)                                                                   
    MCH Strap ( Auto ) 
    CPU Uncore Frequency (Mhz) (16X)                                                
    CPU Clock Skew ( 0 ps ) 
    Spread Spectrum ( Disabled ) 
    PCIE Frequency (Mhz) ( 100 ) 
    
    Memory Feature        
    Memory Speed ( Standard ) 
    Memory Control Setting ( Enabled ) 
    Memory Frequency ( 2:8 )                                                                
    Channel Interleave Setting ( 6 Way ) 
    Rank Interleave Setting ( 4 Way ) 
    Memory Low Gap ( Auto ) 
    tCL Setting ( 8 ) 
    tRCD Setting ( 8 ) 
    tRP Setting ( 8 ) 
    tRAS Setting ( 24 ) 
    tRFC Setting ( 74 ) 
    Command Rate ( 2t ) 
    
    Voltage Control 
    EVGA VDroop Control ( With VDroop ) 
    CPU VCore ( 1.38125)                                                                                            
    CPU VTT Voltage ( +25mV ) (1.12500v 
    CPU PLL VCore ( 1.8 ) 
    DIMM Voltage ( 1.5 ) 
    DIMM DQ Vref ( +0mV ) 
    QPI PLL VCore (1.100) 
    IOH VCore (1.375) 
    IOH/ICH I/O Voltage (1.50) 
    ICH VCore ( 1.100 ) 
    
    CPU Feature 
    Intel SpeedStep ( Disabled ) 
    Turbo Mode Function ( Enabled) 
    CxE Function ( Disabled ) 
    Execute Disable Bit ( Enabled ) 
    Virtualization Technology ( Disabled ) 
    Intel HT Technology ( Enabled ) 
    Active Processor Cores ( All ) 
    QPI Control Settings ( Enabled ) 
    QPI Link Fast Mode ( Enabled ) 
    QPI Frequency Selection ( 4.800 GT/s )
    
    
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