1066 on Asus P5KC
I have the same Processor - It'll do a 333Mhz Front Side Bus (3.0Ghz
overclock) on stock power settings (or less!), no problem.
Interestingly enough, that works out to a roughly 1333 Mhz on the
memory side of things. So if you are planning on running 1:1 FSB:Memory
then you'll want to make sure your memory and Mobo support that. IMHO,
1:1 is a lovely target. But reality is what it is, and the DIMMS I
currently have don't like running that fast. At least not four at a
time on this particular motherboard.
So I set them at 1066 (533 apiece), which is exactly what they are
rated for. My system is beautifully stable and cool running at that
setting (333Mhz/3.0Ghz into memory running at 1066). Idles in the low
30's C, and stabilizes around 57C for hours at a time under Prime 95
test 1.
If you want to push more than that, the random buzz is that 3.2Ghz
(355 Mhz FSB at the stock 9 CPU multiplier, 400 Mhz if you lower the multiplier to seems to be roughly the first, reasonably attainable, hurdle for an air
cooled system. Some individual chips will run faster on air. Others?
Not so much... Personally, I'm happy with 3Ghz, though.