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Overclocking i7-860 - Screen Freeze and USB Power Loss

post #1 of 17
Thread Starter 
Im trying to overclock my i7-860 to 3.8ghz and i keep running into the same problem. While running prime 95 the screen freezes and the mouse and keyboard lose power and the power and reset buttons stop working.
Settings are:
181x21
1.328V
VTT 1.3V
DRAM 1.65V
Any help guys?
Edited by themidgetman - 2/1/11 at 2:42pm
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post #2 of 17
Does it ever BSOD? If so, what error does it give you?

I remember having the computer lock up while testing out my OC. No BSOD... Just locked. Fiddled with my PLL I think...
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post #3 of 17
Thread Starter 
It doesnt BSOD, only locks up as mentioned, and sadly my board only has a few voltage settings, VCore, VTT, PCH, and DRAM - which one would you suggest increasing?
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post #4 of 17
Quote:
Originally Posted by themidgetman;12227222 
It doesnt BSOD, only locks up as mentioned, and sadly my board only has a few voltage settings, VCore, VTT, PCH, and DRAM - which one would you suggest increasing?

Go for 1.4v vcore. Watch the temps. Try to keep it under 80deg while loaded.
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post #5 of 17
my 870 is stable @ 4.32ghz using an h50 in push pull , u shuld be priming 3.8 easily ...

Follow my instructions ..

set ur multi to 22x and enable turbo in your bios this will give you 24x multi .. Try 24 x 160 bclk = 3840Mhz @ 1.35 - 1.37v depending on ur hardware that should keep you stable at 3.8ghz in prime =)

With mine if i set 21x anything i wont pass prime even at 4.2Ghz which i can easily pass prime with at 24x175 .

21x multi will be unstable on ur system , use either 22x without turbo or 24x with turbo enabled and dont go over 170 blck .

Doing this should get u stable , 100% ..
Edited by Xristo - 2/1/11 at 2:59pm
    
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post #6 of 17
Quote:
Originally Posted by norcaljason;12227266 
Go for 1.4v vcore. Watch the temps. Try to keep it under 80deg while loaded.

1.4v is not needed , i use 1.408v for 4.2Ghz 24/7 stable . 3.8 Ghz should hold up with 1.36v if not a touch more ... Im telling you its the 21x multi thats giving u instibility , just ask how i knoww tongue.gif i own an 870 and iv played with this cpu alot trying to get the best overclock and 21x multi didnt get me anywhere besides bsod =)
    
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post #7 of 17
Thread Starter 
well my mobo (P55a-g55) doesnt allow anything higher than a 21x multi =(
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Keith-PC
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post #8 of 17
My First Build
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My First Build
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WD Black 750 Samsung H50, pull/push Win7 Pro 64 
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post #9 of 17
Thread Starter 
attempting 200bclk x 19 multi with 1.352v after vdroop, will post how it goes
Keith-PC
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Keith-PC
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post #10 of 17
Thread Starter 
BSOD with a stop 0x00000124, what does that mean?
Keith-PC
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Keith-PC
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CoolingCoolingCoolingOS
MCP655 2x TFC xChanger 480mm 20x Delta WFB1212H Windows 7 Ultimate x64 
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