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Why can't I stabilize at 4.2?

post #1 of 20
Thread Starter 
I'm pretty sure I can hit 4.2ghz with my E8400, I don't know what's holding me back. Right now, I have it stable at 4.0ghz at 1.275v in the bios, but CPU-Z is showing 1.264 but drops to 1.248v on load, but still stable, and I added +0.5 to the FSB OverVoltage Control.

The problem I am having is I can't get stable at 4.2ghz, I keep failing Orthos after about an hour. I set the vcore to 1.325, but CPU-Z reports 1.312, and then drops down to 1.294 on load. I tried adding +0.050 to the (G)MCH OverVoltage Control (northbridge). What else could be holding me back? Should I add more to the vcore?
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post #2 of 20
Your able to get into windows at 4.2GHz you should concider yourself quite lucky, I think concidering your VDroop, yea you could add more VCore.
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post #3 of 20
I'm not exactly sure but I think as long as you don't pass 1.35 on those E8400's you'll be just fine. That is a big Vdroop tho.
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post #4 of 20
Quote:
Originally Posted by Truambitionz View Post
I'm not exactly sure but I think as long as you don't pass 1.35 on those E8400's you'll be just fine. That is a big Vdroop tho.
Yeah I was just going to say, anything 1.35v and below is good. Just don't go above that, those 45nm don't like that much voltage.
post #5 of 20
Thread Starter 
Quote:
Originally Posted by Avacado View Post
Your able to get into windows at 4.2GHz you should concider yourself quite lucky, I think concidering your VDroop, yea you could add more VCore.
Yeah, I got a good proc out of the batch. Right now my temps are at 31°c, so if I increase the vcore a little bit and be stable at 4.2, I'm guessing my temps will just be at 37°c idle, which really good. That's why I think I'm safe to play up to 4.4ghz.

Quote:
Originally Posted by Truambitionz View Post
I'm not exactly sure but I think as long as you don't pass 1.35 on those E8400's you'll be just fine. That is a big Vdroop tho.
Yeah, that vdroop is killing me. I've searched around for a vdroop mod for my board, but haven't come across any. I guess I can continue to increase my vcore until it's stable and under 1.35.

Any other suggestions?
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post #6 of 20
I don't think you need any other suggestions, you have the voltage to play with concidering the GIGA curse.... bump that VCore and post your pics when you boot 4.4
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post #7 of 20
Thread Starter 
Well, if I need to, how much do you think I should increase on the northbridge voltage? Or should I just go in increments of +0.05?
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post #8 of 20
You should be increasing the NB as well as the FSB voltage. Should appear as MCH/FSB on GIGA boards. That will help, but your main source of stability will be relaxed ram timings and good cooling. Unless your NB is cooled, your going to get reboots from Temps to it (My Wall).
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post #9 of 20
if you went from stable 4.0 at 1.275 to 1.325 and still can't get 4.2 you may be maxed out.... try moving up in smaller steps 4.05 4.1 etc.

but yeah give it more juice just to make sure it wont do 4.2 lol
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post #10 of 20
Thread Starter 
I usually set the RAM to auto, and it automatically adjusts the multiplier to 2.40, so if I increase the FSB to 467, then the multiplier increases to 1168, or something like that, I can't really remember the last 2 digits, and the timings are auto to 5-8-8-25. Should I just leave it at auto or try lowering the multiplier?
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