Core i7/X58 Overclocking Thread

[DavyBoy]

I read somewhere that if you lower CPU PLL this can actually help with stability, I have mine set to 1.300v instead of 1.800v, I am now stable at 4.2GHz, I have spent the last 2 days getting it Prime stable though, it has been a real PITA!!!

I need really high Vcore for it to be stable though, 1.3500v in the BIOS, CPUZ says 1.312v under load though, my QPI/Vtt is at 1.335v, and IOH 1.160v, I ran P95 Blend test for 6 hours earlier, and it was fine, however I am going to leave it running overnight just to be 100% sure.

[imo]

I read somewhere that if you lower CPU PLL this can actually help with stability, I have mine set to 1.300v instead of 1.800v, I am now stable at 4.2GHz, I have spent the last 2 days getting it Prime stable though, it has been a real PITA!!!

I need really high Vcore for it to be stable though, 1.3500v in the BIOS, CPUZ says 1.312v under load though, my QPI/Vtt is at 1.335v, and IOH 1.160v, I ran P95 Blend test for 6 hours earlier, and it was fine, however I am going to leave it running overnight just to be 100% sure.

Good luck mate

[rge]

I read somewhere that if you lower CPU PLL this can actually help with stability, I have mine set to 1.300v instead of 1.800v, I am now stable at 4.2GHz, I have spent the last 2 days getting it Prime stable though, it has been a real PITA!!!

I need really high Vcore for it to be stable though, 1.3500v in the BIOS, CPUZ says 1.312v under load though, my QPI/Vtt is at 1.335v, and IOH 1.160v, I ran P95 Blend test for 6 hours earlier, and it was fine, however I am going to leave it running overnight just to be 100% sure.

yep, I should have tried lowering cpu pll further, just bringing that and ioh back to stock made 5ghz stable enough to capture...tried spi which just bsod. Actually your vcore is not that bad, some better and many worse, it is scaling just .03vcore higher than mine.
For prime 10+hrs stable I need 1.34v load for 4.4, 1.31v for 4.3, 1.28v for 4.2. My qpi vtt is about same as yours. Hope the o/n run goes ok.

Oh and definitely cant do any 3d benches at 5ghz would need ln2 for that, could not even run spi 1m..yet anyways, wish I had tried few more settings.

[Chicken Patty]

rge, 1.63v Vcore!!!

I would be afraid of killing my chip using that amount of Vcore without extreme cooling!!!

Can you run any 3d benches at 5GHz?

I'm actually thinking about getting the i950, just for those extra multi's..

218 Bclk for 5Ghz is really good..

Thanks...actually using stock ioh, cpu pll, helped, upping those actually makes mine unstable. I could have probably gotten there with little less vcore, 4.95 was ok with 1.59...but kept upping vcore, when it was decreasing ioh, pll etc that helped.

1.63v ok for just 15 minutes I needed in attempts. When I tried and failed for 6 hours with my i940 using up to 1.8-1.9vcore that one I was expecting to kill, course my wife has that cpu now...still chugging along fine, but it did take a little more vcore for same stability after that fiasco.

load temps for spi werent much, does not really load cpu much. I think it was just 40's maybe one core 50ish, didnt have time to look, kept trying to get pic before it bsod

I read somewhere that if you lower CPU PLL this can actually help with stability, I have mine set to 1.300v instead of 1.800v, I am now stable at 4.2GHz, I have spent the last 2 days getting it Prime stable though, it has been a real PITA!!!

I need really high Vcore for it to be stable though, 1.3500v in the BIOS, CPUZ says 1.312v under load though, my QPI/Vtt is at 1.335v, and IOH 1.160v, I ran P95 Blend test for 6 hours earlier, and it was fine, however I am going to leave it running overnight just to be 100% sure.

Thanks for the info on the temps, should've remembered Super Pi don't load the CPU much.

Funny though CPU PLL is 1.8v by default right? bluntsmoker is running 1.3v. thats crazy, Unless his board/cpu set it differently, I don't know.

[Anth Seebel]

BLunTSmoKeR , i also used to run low CPU pll around 1.425.. which helped (reduces heat) but too low can hurt linx stability i have noticed in my testing.. so i bumped it up a bit to 1.525 or 1.6 and linx passes for me..

anyway got a new max clock pb today with single stage cooling

[imo]

Good result momoto, sorry im not interseted about vegtables

[imo]

Core i7 920 D0 Batch # 3845B027

4200MHz HT Overclock



Settings:

Ai Overclock Tuner ............ [Manual]
CPU Ratio Setting .............. [Auto]
BCLK Frequency ................ [200]
PCIE Frequency ................ [101]
DRAM Frequency ............... [1600Mhz]
UCLK Frequency ................ [3200MHz]
QPI Link Data Rate ............. [7200MT/s]
Dram Timming Control ......... 6-7-6-18-1T
CPU Voltage ...................... [1.206v]
CPU PLL Voltage ................. [1.80v]
QPI/Dram Core Voltage......... [1.25v]
IOH Voltage ....................... [Auto]
IOH PCIE Voltage ................ [Auto]
ICH Voltage ....................... [Auto]
ICH PCIE Voltage ................ [Auto]
Dram Bus Voltage ............... [1.5v]
Load Line Calibration.............[Enable]
Cpu Differential Amplitude......[Auto]
CPU Spread Spectrum ......... [Disable]
PCIE Spread Spectrum ........ [Disable]
CPU Clock Skew ................ [Normal]
IOH Clock Skew ................ [Auto]

[Pwnzorz]

Hey I recently purchased a Evga X58 e760 Classified motherboard and have a 920 C0/C1, and 12 gigs of Patriot Viper 1333Ram, i know OCing is Crap Shoot, but does anyone have any standard overclock i can try and maybe tweak from there, i'd be happy with anywhere from 3.8 to 4.0gz
The cooler i'm going to be using is a Corsair H50 watercooling kit.
Any help is appreciated! Thanks.

[dan7777]

Hey I recently purchased a Evga X58 e760 Classified motherboard and have a 920 C0/C1, and 12 gigs of Patriot Viper 1333Ram, i know OCing is Crap Shoot, but does anyone have any standard overclock i can try and maybe tweak from there, i'd be happy with anywhere from 3.8 to 4.0gz
The cooler i'm going to be using is a Corsair H50 watercooling kit.
Any help is appreciated! Thanks.

how come you don"t have a 920 DO ?

[Pwnzorz]

the cpu came with a system i purchased prebuilt from Gateway, therefor its a C0/C1

[donmarkoni]

Hey I recently purchased a Evga X58 e760 Classified motherboard and have a 920 C0/C1, and 12 gigs of Patriot Viper 1333Ram, i know OCing is Crap Shoot, but does anyone have any standard overclock i can try and maybe tweak from there, i'd be happy with anywhere from 3.8 to 4.0gz
The cooler i'm going to be using is a Corsair H50 watercooling kit.
Any help is appreciated! Thanks.

I have C0, so maybe you could use some of my settings, just find parallel between DFI and EVGA settings.
Try this (4.4GHz): http://i4memory.com/f80/share-your-d...tml#post119541
or this (4-4.2GHz): http://i4memory.com/f80/cxe-stabilit...66/#post119232
Never mind my statement at the end of the 2nd post, I found I was wrong: http://i4memory.com/f80/cxe-stabilit...tml#post119398