One thing linh, if you're overclocking, PAT will not
work on that board once you start raising the fsb. And raising the fsb will do way more than PAT will anyway, for system performance.
On the P4P800 series, PAT can only be enabled if you are at
200fsb. Once you go a couple fsb over that, PAT is automatically disabled
. You also have to run memory at 2CAS and have memory acceleration mode enabled, to run PAT I think, can't remember now exactly all the requirements.
But ya, if you OC, PAT turns off. Also, if you oc it, the advantages of the oc will far outweigh anything PAT would have given you anyway. Basically, the performance impact of PAT is very small, compared to just OC'ing the computer.
The P4C800 series were the ones with native PAT, since they used the 875 chipset, instead of the 865 like on the p4p800 series. So with that board you could OC and keep PAT on. Honestly there isn't that much difference though, and P4C800 was known to only have a very small performance edge over the P4P800, even with it's PAT.
But really linh, unless you have
to run at stock speeds for some reason and can't
OC, forget about PAT it's worthless on that board for an oc'er. It only gives a very small performance increase anyway, but who cares if you can only do it at stock speeds