Originally Posted by Taeric
You can push a Prescott to around 1.525 volts on air as long as your load temp stays at or below 65°C. I assume you locked your AGP/PCI frequencies as you wouldn't likely come close to the OC you have without having done that. Going that high, you may need to bump your chipset voltage a hair.
Oh ya, good catch taeric, forgot about telling him to lock his agp/pci, that could deffinitely cause some problems, lock them to 66.66/33.33 that's the standard frequencies. Without locking them, when you raise your OC, they'll also go up some, and once they reach a certain level, it will
fail. But taeric is right, I'd think you wouldn't be able to reach such a high OC as you have without having them locked already. I could be wrong, but I thought I read the p4p800 series locked them anyway if you have it set to auto. Maybe I'm thinking about something else though, I lock them anyway.
But also dude, you already have a really good OC going on. If you can get 1GHz over stock speeds, you're already hauling ass. But your on water too right?-- so you may be able to get more out of it who knows. Like taeric says, go ahead and bump your vcore up to 1.525. It should be fine and may help you squeeze a bit more out of it. BE cautious, but I know some people on water or other extreme cooling go a bit higher than 1.525, but don't do that unless your temps are really good.
Another thing to consider is vcore droop, the Asus boards are notorious for that. It doesn't seem to matter for alot of people unless they reach some pretty beefy OC's like you seem to want. I have a p4p800e deluxe, p4p800se, and a p4p800 in my house and they all had alot
of droop when put under load. I did the vcore mod on all 3 and it worked really well. The p4p800 and the se still droop a little bit but are way better than they were. And on my deluxe it worked awesome
, I mean it barely droops at all, like 1.5 or 1.51 idle to 1.49 at full load, almost nothing. Not recommended unless you know how to solder, or at least
have real steady hands and are willing to study up alot before you do it. Plus you need a solder iron with a real small tip, these are tiny, tiny solder points. I've done quite a bit of soldering so it was pretty easy, but I could see a novice destroying their mobo real easily. Good luck! Hope to see you post back "woohoo 4GHz stable!"