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Need HELP I5-2500K OC 4.5ghz - Page 2

post #11 of 97
Thread Starter 
Im at 1.38vcore and its crashing after a few hours in prime blend. Should I up the VTT or PLL?

Should I use prime95 to test or can I just run occt. This is because I think prime is too time consuming.
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post #12 of 97
Quote:
Originally Posted by Zilex View Post
Should I use prime95 to test or can I just run occt. This is because I think prime is too time consuming.
patience is key...... post your bios settings as you have them right now.
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post #13 of 97
Thread Starter 
I will post bios in a sec but everything is the same as my previous picture except I have vtt at 1.1 and vcore at 1.38. I have ran prime 1792 test for 20 mins no bsod, and played a game of sc2 and everything is running good so far. Usually sc2 would bsod instantly.

I failed prime95 overnight as the computer restarted cause of bsod 124.I have attached the images.


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post #14 of 97
I'll let munaim1 do this since he is more knowledgeable in SB OC-ing than I am.


However, I prefer to do sub 4.7Ghz OC's with offset instead of manually setting the voltage. (You can leave offset on auto for the first run and mess with it after).

I find that with manual voltage set for my current 4.5Ghz OC, my chip is fed ~1.35V however, with auto, it is only fed 1.288-1.302v(max) and is fully stable.

Just a little something you could consider. Either you have a bad chip+board combo or there's something wrong with one of your BIOS settings (i'd by default point to vtt but following the thread, that seems not to be the issue *entirely* here)

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post #15 of 97
Thread Starter 
I am only trying to OC to 4.5ghz. I can not use auto because it sets my vcore to 1.12 which is clearly too low for 4.5ghz and my computer doesnt even boot into windows. I have noticed that the vcore set in bios is completely differnt than cpu-z. When I have 1.380 set in the bios cpuz-z reads 1.368 during prime, another example is at 1.365 and cpu-z reads at 1.352.
Edited by Zilex - 9/17/11 at 6:15am
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post #16 of 97
That's called vdroop, you can control this with LLC but it won't be 100% perfect or in your case Vdroop Control.

What I'd recommend is to find a stable OC even if it's a bit too much volts just as a base reference and then work your way down with the different voltages.
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post #17 of 97
Thread Starter 
Alright whats the max safe 24/7 voltage?
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post #18 of 97
Quote:
Originally Posted by Zilex View Post
I failed prime95 overnight as the computer restarted cause of bsod 124.I have attached the images.
disable PLL overvotlage until you have problems booting into windows with a higher multi.

I/O - auto
SA voltage - AUTO
PLL voltage - Auto for now.

Run prime and report back .
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post #19 of 97
Disable turbo boost. Disable internal PLL, at 4.5 u dont need to enable that. And raised vcore all the way up to 1.39v if you have to, trust me the problem is the Vcore.
post #20 of 97
Try to achieve 4.5 with v 1.36 and got bsod after 3h of blend now running at v1.37 my gf will text me if it goes over 3h.. is 3h ok for stable test ?
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