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Trouble keeping i7 2600k voltage @ 5ghz stable

post #1 of 7
Thread Starter 
My i7 2600k keeps crashing under heavy load @ 5ghz I have the core voltage set to 1.475 in bios, and I have HT disabled. My mobo is a Gigabyte P67A-UD4-B3
post #2 of 7
Quote:
Originally Posted by Supracharge View Post

My i7 2600k keeps crashing under heavy load @ 5ghz I have the core voltage set to 1.475 in bios, and I have HT disabled. My mobo is a Gigabyte P67A-UD4-B3

Either add more voltage or settle for 4.8GHz.

That's really your only choice.
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Snowdevil
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post #3 of 7
Thread Starter 
Seems like a lot of voltage just for 4.8 ghz smilingsmiley.gif Is there anything else I can do besides raising the core voltage? I'll give 4.8 ghz a try w/intel burn test
post #4 of 7
It's possible that you have simply hit your chip's voltage wall. You might just have to keep adding voltage if you want it stable, but I don't think it's worth it. I could easily run my 2500k at 5ghz but there really isn't any noticeable gain to be seen, and then I'm just shortening the life of my chip and have to worry more about temps.
post #5 of 7
You may wanna play around either raising or lowering PLL, or raising VTT just a bit.

Do you happen to see a BSOD, or the computer just hangs? That might help in telling what the problem is.

Also, 1.475v seems too high for 5 GHz. While Sandy's are awesome clockers, not all can hit 5 GHz with multi only. You might want to also try leaving multi to 49x and raising bclk to 102, or choosing 48x multi and 104 bclk.

As a last resort, you might need to settle for 4.9-4.8 GHz. You might have one of those chips that simply can't get to 5 GHz.
   
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post #6 of 7
Thread Starter 
Quote:
Originally Posted by Starbomba View Post

You may wanna play around either raising or lowering PLL, or raising VTT just a bit.

Do you happen to see a BSOD, or the computer just hangs? That might help in telling what the problem is.

Also, 1.475v seems too high for 5 GHz. While Sandy's are awesome clockers, not all can hit 5 GHz with multi only. You might want to also try leaving multi to 49x and raising bclk to 102, or choosing 48x multi and 104 bclk.

As a last resort, you might need to settle for 4.9-4.8 GHz. You might have one of those chips that simply can't get to 5 GHz.

bsod with cpu under heavy load. I can boot into desktop just fine @ 5.2 ghz though

It seems like I do indeed have a fail chip. Anything over 4.8 ghz at 1.5v or below just bsod's and I get error 101 meaning to add more vcore voltage. I really don't feel comfortable going over 1.5v. I'd like for my cpu to last me another year.
Edited by Supracharge - 3/3/13 at 5:54pm
post #7 of 7
Well yeah, 1.5v is too close to the max (1.52v) to be safe for 24/7.

Maybe try tweaking the bclk? Up to 105 MHz should be safe enough for 24/7 operation (if you can POST at those speeds, my 2600k can't post over 103.4 MHz without voltage tweaking). Keep in mind you're OCing the RAM a bit as well, so the DRAM and VTT voltages may need to be adjusted just a step or two.

You can also try playing with the PLL. My 2600k cannot boot to the desktop @ 5 GHz with 1.4v vcore and 1.83v PLL, but it can boot at like 1.60v PLL. After that, it's only a matter of finding the right vcore for it.
   
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