P4 478 pin max voltage

[AirborneSilva]

Can anyone tell me what the Max voltage for a P4 1.8GHz 478 pin (willamette), is? I have search for the answer (and can't figure out the enginer speak at intel). Any and all help would be, well of help :)

Aloha

[funnyperson1]

default is 1.475 or 1.5 i wouldnt go above 1.9 unless its watercooled.....

[AirborneSilva]

Thanks for the reply, it's the only one I have gotten with any numbers on it and I have posted in 3 diffrent forums! I do have to ask, is it your concern that it would overheat?

Mahalo and Aloha

[Grande Juan]

That's like asking Mr. Owl how many licks it takes to get to the center of a tootsie pop. Three I think it was. But seriously why do you need too know? I'm currently using 1.76v but might eventually go up to 1.85v I would'nt consider any thing higher though. Until I get there anyway.:cool:

[batboy]

According to the official Intel s-specs (see link below), the default voltage is 1.75V for the listed CPU (the new Northwood P-4's have a default of 1.5v). As far as the maximum you can go? That depends on whether you mean max stable or max before it fries. Regardless, it mostly depends on how good your cooling is. The better the cooling, the higher you can safely go with voltage. The rule of thumb for air cooling is no more than 10% to 15% increase. Those P-4's do have thermal throttling, so that does increase your margin of error a bit. Without exceptional cooling, going up to 1.85v to 1.9v is about all I would ever do.

http://support.intel.com/support/processors/sspec/p4p.htm

[AirborneSilva]

The reason I want to know is so I can push my processor higher. I currently have it running at 2034MHz with the voltage set at 1.85. It runs extremly stable at that speed/voltage. My processor temp is 104 (no load) and 109 after playing max payne for a while, so I don't think at this point temp is a problem, I do have good cooling in my case.

[Grande Juan]

Most excellent OC dude. Why not go for 1.9v? Heh whats that smell?

[nuciles]

Originally posted by AirborneSilva
My processor temp is 104 (no load) and 109 after playing max payne for a while, so I don't think at this point temp is a problem, I do have good cooling in my case.

104F = 40C and 109F = 43C. Isn't that temperature a bit high. I think he needs to get a better HSF before pushing the voltage higher.

[KILLorBE]

For P4's with a default voltage of 1.7 or 1.75V the max. is 2.1V
For P4's with a default voltage of 1.5 the max. is 1.75V

[batboy]

Actually, a full load CPU temp of 43 degress is not bad. Those Willy P-4 CPUs typically run a little hotter than the P-III and Celeron coppermines. I would say that 1.9v is probably fairly safe to try.

FRIENDLY REMINDER: Since this is an international forum, we generally try to report all temperatures in degrees Celsius. If you use degrees Fahrenheit, please also include the metric conversion too. Thanks.

[jmsandrsn]

I don't believe I've ever seen this discussed before...Is it possible to do the "wire trick" on P4's. I don't even have a P4 but might get one in the future.

[batboy]

I believe I heard about someone doing the "wire trick" to an older Willy P-4, but I don't remember any details.

[KILLorBE]

Originally posted by jmsandrsn
I don't believe I've ever seen this discussed before...Is it possible to do the "wire trick" on P4's. I don't even have a P4 but might get one in the future.

Yes it is possible with both 423 and 478 pins P4's, but the max would be 1.85V + BIOS adjustment.

You can read some about that here (http://forums.overclockers.ws/vb/showthread.php?threadid=47405) (for the 478 pins), eazulu posted a link for the 423 in the same thread.

Don't look at my crappy paint job:p :beer:

[AirborneSilva]

Thanks KILLorBE, finally a definetive answer! I had read on the intel site that 2.10 was max but, as previously stated, I am not an engineer and was not sure if I was reading it right so I didn't want to make a $200 guess!

I did not want to offend anyone, and still don't but I don't know what the conversion is to celcius (or even know if I'm spelling it right), so if I have offended anyone and or left them out of the conversation because they in turn don't know how to convert (as I don't know how), then I am sorry it was not my intent, just my lack of knowledge.

[nuciles]

C = (F - 32)*5/9
F = C*9/5 + 32

[batboy]

Nope, don't think you offended anyone, just pointing out that lots of people on the forum use metric. I do my conversions the easy way. Go to the below link.

http://www.sciencemadesimple.net/temperature.html

[AirborneSilva]

Thanks for the link:)