I have the eVGA 750i and I've hit a 470 FSB.. and could probably do more but not tried yet.. thats over 4.2 Ghz on my Q9650.. So my 750i is workin pretty good so far.

also to Napalm and all you others.. question. I see you said that your not sure anyone could hit 4.5 Ghz with a 500w PSU.. and I see your point. I have the Corsair HX520. I've heard they are really good PSU's. but today I saw something that worried me. I downloaded CPUID's HwMonitor. and the PSU voltages were NOT good. Here. check it out for yourself.

Now this is a SS of my system. with 4.0 Ghz at 444FSB.. with a 1:1 Divider and my GTX260 from 576MHz to 730 Mhz. (great Card.) and the temps.. bla bla bla.
Here's what worried me. I've said a few times before that my PSU's 12v rail was running at 11.92 but this is what HwMontitor reads.. NOT good. but could be wrong.


12v Rail is at 7.39v.. (Can't be right) I'd be having Major issues right? I just played 3 hours of HL2 EP1 with NO problems at 4.0 Ghz. There's no way it would be stable with 7.30v on 12v rail right?
then the 3.3 is at 3.0v thats ok i guess. then the 5v at 4.56. thats ok but could be better. (Are these wrong)

In the BIOS the 12v rail reads 11.92 instead of this 7.36v BS.. So I'm just not sure now. and Napalm, you said a 500w couldn't push 4.5 Ghz.. what would.. the Corsair Hx620.. or should I go bigger? 750, 800. and also do you think my current PSU is "NOT" enough.. or is it ok?