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No post = Insufficient voltages?

post #1 of 5
Thread Starter 
Just curious. I'm fairly tech savvy when it comes to troubleshooting, but I'm fresh off the bus when it comes to overclocking.

I'm trying to get my i7 920 C0 (Intel DX58SO mobo w/ up to date BIOS) up to 3.6 stable, but pretty much anything over 170*20 doesnt even post, and 170 has crashed. Scaled back to 160*20 and I'm stable and cool.

When it doesnt post at all, is that an indicator that I need to up the POWAH? Or does that just mean no-go? I've been letting the mobo set auto voltages, dunno how well that works.
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post #2 of 5
Use 19 multiplier, 20 is finicky

Also, search the forums for the i7 overclocking thread. Some great walk-throughs on how to finagle your way up to 4ghz-ish.

GL!
Beast of Burden
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Cool story, bro!
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Beast of Burden
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Cool story, bro!
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CoolingCoolingCoolingOS
EK FC-7970 w/ Backplate Copper/Acetal RX360 w/ 3x Yate Loon High Speed in Push XSPC Dual Bay Res w/ D5 Pump Windows 7 
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post #3 of 5
Thread Starter 
Cool, did some reading and adjusted some multipliers and voltages, and I've safely worked my way up to 180*19 before I had to go to work this morning (what kind of bank is open until 6pm on new years anyways?)

I'll give 185*19 an hour or so on P95 before I make the jump to 190... what would you think are the odds of doing it on 1.35v? I'll bump it to 1.37 if I have to, but I always hear the higher you raise it, the hotter it runs and shorter it lives.
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My System
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Antec Nine-Hundred 
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post #4 of 5
Quote:
Originally Posted by anomaly597 View Post
Cool, did some reading and adjusted some multipliers and voltages, and I've safely worked my way up to 180*19 before I had to go to work this morning (what kind of bank is open until 6pm on new years anyways?)

I'll give 185*19 an hour or so on P95 before I make the jump to 190... what would you think are the odds of doing it on 1.35v? I'll bump it to 1.37 if I have to, but I always hear the higher you raise it, the hotter it runs and shorter it lives.
as long as you stay within intel spec you will be ok. in fact you can go over intel spec by a little bit without it effecting the life of the chip. high temps will kill your chip faster than a vcore that hovers the limit of intel spec.

also, the no post thing could be several issues. the first thing is to make sure that your ram is not overclocked. keep your ram at factory spec or lower. this way the ram can be eliminated as causing your computer to fail post.
its also best to manually enter values for the ram, like the volts and the timings, this why your bios wont auto adjust them.

if after this you still cant post increase your vcore a notch or two, and if still a no go raise it a bit more. also increasing the vtt can help too.

as far as the 20x multiplier, you shouldnt be having any problems at your current frequency. im running 200x20 right now and am perfectly stable.

i would check the intel site and get some info on your specific chip. write down the vid range and other voltages. this way you dont go over the limit.

also you could try enable load line calibration(aka without vdroop) if you havent already.
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post #5 of 5
Try to grab the blue screen code. You'll see a bunch of 0s but usually one of the forst errors will have a 101 or 124 code on it- provided you haven't messed with timings on ram.

If you can tell us which code you see that'll give us an idea as to whether it's vcore or qpi adjustment that's needed

Also a lot of other adjustments can help stabilize the oc. It can help tweak your settings when voltage alone doesn't suffice.
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