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Help making 4.2ghz stable

post #1 of 22
Thread Starter 
Hey guys

I've always run my system at 3.8 but since I got crossfire I figure I might as well push for something faster.

It looks like I got 4.0 stable. Max heat prime95 test for 11 hours was fine. Max heat 74C or so but peaking there not running at that temp.

I had 4.2 pretty much game stable last night but it would not run prime for more than 10 minutes. I went up to about 1.3250vcore and upped all the other voltages as well.

The problem is that I don't really know all the voltage maxes anymore or what I should be changing.

Any tips? This would be 200x21 = 4200mhz, Ram would be stock at 1600mhz.
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post #2 of 22
I'd keep bumping up that vcore, you're safe up to 1.45v. I would watch your temps, though, you'll be hitting 80c soon.
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post #3 of 22
Try 201 x 21 or 199 x 21.
Sometimes odd #'s work better than even.
post #4 of 22
Thread Starter 
Yeah I think it might be out of reach. I went up to 1.350vcore and cranked a few others, still unstable and temps were basically 80C.
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post #5 of 22
Quote:
Originally Posted by bigvaL View Post
Yeah I think it might be out of reach. I went up to 1.350vcore and cranked a few others, still unstable and temps were basically 80C.
Yeah, that's how it is with my chip as well. I'm almost stable ~1.37, but I'm in the mid-80s.

I'm hoping to get a Rasa kit soon, though.
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post #6 of 22
Try 21x200 1.35v and 1.3VTT, temps should be a littlebit under 80 and stable! Depends on chip though, but I can run 4.2Ghz on 1.3v and 4.4Ghz on 1.38v
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post #7 of 22
Thread Starter 
I don't see VTT in my bios. Here's a pic showing all the voltages I can change:

http://common.ziffdavisinternet.com/...=195328,00.jpg


Is VTT that's QPI one in my bios? If so it's already at 1.3500
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post #8 of 22
Quote:
Originally Posted by bigvaL View Post
I don't see VTT in my bios. Here's a pic showing all the voltages I can change:

http://common.ziffdavisinternet.com/...=195328,00.jpg


Is VTT that's QPI one in my bios? If so it's already at 1.3500
QPI/Core voltage
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post #9 of 22
Thread Starter 
Bumping this thread. I got a new cooler and temps didn't get MUCH better but maybe they won't rise as fast.

This is what my bios looks like (this is not my settings though).


What would be a good starting point for some of these voltages? I've gone up to 1.3500 vcore on my old cooler and the temps were too high. Maybe just try going higher now and see what happens?
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post #10 of 22
This might help..We have the same Mobo....if you need more let me know
this is 21x200
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