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Highest acceptable voltage on Skt 478 Prescott

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betterlife18

Member
Joined
Mar 23, 2004
Location
Nashville, TN
What is the safest highest voltage for a s478 to be at? right now I have it set to 1.375 in the BIOS, but with my P4C800-E, of course, the voltage doesn't stay that. Right now it bounces between 1.38 and 1.41. Last night I tried booting at 4GHz. It posted and began to load Windows, but then restarted itself. Ok so now I need more voltage.

BUT...

I have a Cooler Master Jet 4. Not exactly the best cooling method for this. It's decent for 3.6GHz (what I'm at right now), but of course 4GHz... not happening, especially when I up the voltage. Sometime in the future, I'm thinking about going with a XP-120 like every other friggin person in here that's on air cooling :p

If I am able to keep the temps under, oh say... 55C (load, idle, whatever) with my current cooling solution, what is the highest voltage I should put it at? I'm not going to run it permanetly, just want to run a few benchmarks and take a few screenies.

Thanks :attn:
 
1.50 volts should be safe. Even 1.55 will work. Try 1.54. At 1.41 you are barely running stock as it's spec'd to make at 1.4. Let us know how this works for you.
 
Probably should stay at 1.5v or less. Maybe you can do some super cheap cooling mods to improve case ventilation. Check out the cooling links in my signature for a few ideas (like the side duct).
 
1.525 volts is the usual max that people will go to to OC their pressy

i personally have to bump it up to 1.550 in BIOS, as it droops to 1.520 idle & 1.470 load from 1.550 :eek:
 
Ok, what I did was set it to 1.45 and at 4GHz it booted to Windows fine this time. I went to test the stability with PCMark04. The idle temps were about 47C. By the way I have 4x80mm case fans. After the first couple of tests, PCMark04 just closed itself out. I was like, what tha? I boosted the voltage to 1.4625, PCMark still crashed, except I got a blue screen that time. Tried 1.475, idle temps were like 50C so I was pretty scared. PCMark04 also crashed. TEMPS ARE TOO HIGH! :temper: I'm not going to raise the voltage any more until I do get better cooling (XP-120 or better). Right now I guess 3.6 @ stock voltage will have to do for me :cry:
 
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