Originally Posted by Impugningcynic
I've read from numerous sources that going over 1.4 to 1.45 volts for 24/7 operation is dangerous for the C2Ds. It's not just about temperature -- the processor wasn't designed for that kind of voltage input, and it can be permanently damaged, in spite of the fact that it might be adequately cooled. Can you explain why these sources would all be saying similar things if this isn't true?
Also I see you have an e8400 @ 4.95Ghz ON AIR! Holy crap! What voltage are you using? And do you live in Antarctica? Your air must be really damn cold...
Okay I will try and explain how it works. High voltage is bad in two ways, one is the heat that high voltage will generate, and two is instability in a combination with higher speeds. Think of it this way, if you have a muscle car with a lot of horse power but a dirty air cleaner it's going to chug and not run right, and eventually cause something to break but with a clean filter you can get great performance for a long time.
Intel's "Safe" spec for a 45nm chip is 1.45 volt's. Keep in mind that is not set in stone but more of a rule of thumb. Most C0's take a bit of volts to hit 4.0 to 4.5.
Now put this all together and as long as you do plenty of stability testing and you know it's ROCK solid don't be afraid to run it at 1.5ish to get the speed you want.