E8400@4Ghz - voltage help!!

Jqim said:
I need some similar advice with my e8400.
It sits in a P5Q se2 next to 2x2gb 1066mhz dominators.
It passed 24hrs of prime95 at 3.6 but I have not adjusted any of the other voltages apart from the vcore. I would like to get it to 4ghz but last time i tried it one of the cores failed prim95 after 7 hours(the other was fine). Also one of my cores tends to run 3-7 degrees hotter than the other; is that normal?

One other thing to note, I am running my memory on 1:1 (800mhz) because when I put it up I had 'shutdown issues' which ment basicly my system would not fully power down and I have to hold the power button for 4 seconds to make the fans etc stop spinning. Not idea why this happened but I gave up trying to fix it and just had slighlty slower ram.

my case is raven02 and cooler is freezer 7 so cooling should not be a problem.

Any advice on what to do or even where to read up on chipset voltages would be a huge help.
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Memory at 1:1 is fine, but you should hit 4GHz no problem. That hot core is probably down to the cooler not being seated correctly, but they're never perfectly even. 7C is a bit more than I'd be happy with though. What Vcore are you running at now, and what was it at for your 4GHz run? I'm at 4.25GHz at 1.328V so you shouldn't need a huge amount for 4GHz
 
I cant remeber exacly but I think I set the vcore to 1.4 in bios. I remeber thinking, 'no one else needs this manny volts, maybe mine is a dud'.
 
Really? That's way more than I'd feel comfortable with. I'd start looking at your mobo for the cause of your instability. When you said that raising the memory multi caused BSOD it made me think your NB needs more juice, and your 1.4V run pretty much rules out your cpu lol. Remember, small increments is the way to go. These chips can degrade very quickly when you stress test them at high voltages. Personally, I wouldn't want to go over 1.36 with a wolfy, especially after finding my chip was slowly degrading at that voltage when I was running it at 4.5GHz. 6 months later it took more voltage to get the same clock so I backed it off a bit and it's been fine since.
 
I will start by copying the voltages mentioned erlyer in this thread as I have a similar mobo.

Ram did not cause BSOD it just ment that after I shutdown my computer i had to hold the power button after everytihng had un-booted. It was a mild anoyance that REALY annoyed me! Mostly after my gf said 'all that fancy computer stuff and it dosent even work properly'
 
Jqim said:
I will start by copying the voltages mentioned erlyer in this thread as I have a similar mobo.

Ram did not cause BSOD it just ment that after I shutdown my computer i had to hold the power button after everytihng had un-booted. It was a mild anoyance that REALY annoyed me! Mostly after my gf said 'all that fancy computer stuff and it dosent even work properly'
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I can relate to that lol. Have a play with your NB volts though, or even drop the multi on your cpu and see how high your fsb goes before you lose stability so you know how far your board will take you.
 
bifday2k said:
You can safely go to 1.4v windows (cpu-z) load (100%), that could be a lot higher in the bios, but aslong as u stay below 1.4v under full load you will be fine, aslong as temps are fine ofcourse.
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For the record, the VID range of the e8400 is 0.8500V-1.3625V. Above the technically isn't "safe", although it should be fine *touch wood*.
 
ok chaps, I have given my nothbridge and other things a touch more volts. I set my vcore to 1.36 in the bios (3.6ghz was stable with 1.28) just started prime95 on FFT. after a few mins core 0 is on 53 degrees and core 1 is on 46, which is a little odd, but neither will be getting too hot. I may reseat the cooler is the overclock is sucsessful.

wish me luck I will let you know what happens tomorrow.
 
Good luck bro, let us know. If you really want to stress it to see worst case scenario temps I suggest LinX. It's a bit faster too (but not a substitute for long prime runs, just a good way to get an idea of whether you're pretty much there)
 
Another weird thing, the 'cooler' core finished passes first with the hotter one finishing a min or 2 after.

I have a memory that I have been supressing sins it happened. When I fisrt started OC I MAY have acidentialy set the vcore to 1.75 (max) by accident of course, I dont think I made it to windows but just went to bios again after a reboot. Could the latency and the temp diference mean I slightly fryed one of my cores?
 
I just passed 21 hours of prime95. Max temps are 55c and 50c. its not quite 24 hours but I would call that a success! Now there is just this weird issue of different temps. Thx everyone
 
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