Voltage Question on a 805

[Jma251]

Since this seems to be the hot spot on all the 805 OC'ers out there I gotta Question...

Whats the max SAFE vcore setting to put on one of these, I hear different answers all the time. Is it a matter of heat only (to an extent of course) or is it a general subject of burning up the CPU.

I got one that had a seemingly low volt requirement, and OC'd great right UP till 4.0, it would post but of course not be stable. I have the VCore currently set at 1.58, which there inlies the question, my temps are fine nothing over 100 degrees really, and that leaves my vcore bouncing around 1.54 at its hieght that ive seen it reported... So am I safe here or should I be worried? And if this deams to be unstable is 1.6 at those temps ok to hit... I dont intend and will not go one step over 1.6 tho.

 

[illinikevin]

When you say 100 deg. is that C or F. 100F is fine 100C is over the limit. The voltage limit is only important as far as heat is concerned. My temps max out at 70c with the voltage set at 1.5V. Any more voltage and the temps start running into the mid 70's and I feel that is a little to high. The other thing you need to be concerned is the voltage regulator on the board. Drawing too much current through it(ie. high Vcores) creates heat and can damage it. Most boards use heatsinks to prevent this but check and make sure. I'm not sure what the temp limit is for continous use on a P4 is but it can't be more than 75 or 80c. If anyone knows please let me know.

 

[ekidhardt]

Just to add some confusion.

I'm running my 805@4.0 at 1.49v stably. I'm not sure why I can run it so low, but my idle temps are 50-52 and max load 65-68. At around 70 it crashes. The weather here is super hot, and I believe my water cooler isn't as good as it could be--so I'm going to replace the silicon tubing with flex copper piping and see if I can cool it down a good 5c.

I have the p5nd2-sli mobo from ASUS.

Anyway, after reading all this stuff I had no idea whether or not my voltage was crashing me, or my heat was. Turns out a combination of heat + the CPU throttler was killing me. Once I turned the voltage DOWN..and the throttler off, I haven't crashed in a day or so after trying various intensive programs.

good luck!

E