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

[Steagan]

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.

 

[HugoStiglitz]

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.

 

[Steagan]

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

 

[rndmavis]

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.

 

[Xlack]

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.

 

[Steagan]

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:



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[AXDA2500]

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.

 

[Steagan]

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 )