Sign in with
Sign up | Sign in
Your question

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

Last response: in Overclocking
Share
February 23, 2012 8:13:53 PM

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.









February 24, 2012 12:16:55 AM

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
m
0
l
Related resources
February 24, 2012 7:49:43 PM

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.
m
0
l
February 25, 2012 4:26:02 AM

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.
m
0
l
February 26, 2012 6:50:52 AM

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:



Uploaded with ImageShack.us



Uploaded with ImageShack.us



Uploaded with ImageShack.us




Uploaded with ImageShack.us





m
0
l
February 29, 2012 5:47:55 AM

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.
m
0
l
February 29, 2012 11:34:25 PM

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!
  1. Frequency Control
  2. CPU Clock Ratio ( 20X )
  3. CPU Host Frequency (Mhz) ( 184 BSLK)
  4. MCH Strap ( Auto )
  5. CPU Uncore Frequency (Mhz) (16X)
  6. CPU Clock Skew ( 0 ps )
  7. Spread Spectrum ( Disabled )
  8. PCIE Frequency (Mhz) ( 100 )
  9.  
  10. Memory Feature
  11. Memory Speed ( Standard )
  12. Memory Control Setting ( Enabled )
  13. Memory Frequency ( 2:8 )
  14. Channel Interleave Setting ( 6 Way )
  15. Rank Interleave Setting ( 4 Way )
  16. Memory Low Gap ( Auto )
  17. tCL Setting ( 8 )
  18. tRCD Setting ( 8 )
  19. tRP Setting ( 8 )
  20. tRAS Setting ( 24 )
  21. tRFC Setting ( 74 )
  22. Command Rate ( 2t )
  23.  
  24. Voltage Control
  25. EVGA VDroop Control ( With VDroop )
  26. CPU VCore ( 1.38125)
  27. CPU VTT Voltage ( +25mV ) (1.12500v
  28. CPU PLL VCore ( 1.8 )
  29. DIMM Voltage ( 1.5 )
  30. DIMM DQ Vref ( +0mV )
  31. QPI PLL VCore (1.100)
  32. IOH VCore (1.375)
  33. IOH/ICH I/O Voltage (1.50)
  34. ICH VCore ( 1.100 )
  35.  
  36. CPU Feature
  37. Intel SpeedStep ( Disabled )
  38. Turbo Mode Function ( Enabled)
  39. CxE Function ( Disabled )
  40. Execute Disable Bit ( Enabled )
  41. Virtualization Technology ( Disabled )
  42. Intel HT Technology ( Enabled )
  43. Active Processor Cores ( All )
  44. QPI Control Settings ( Enabled )
  45. QPI Link Fast Mode ( Enabled )
  46. QPI Frequency Selection ( 4.800 GT/s )
m
0
l
!