Help with OC P4P800 DX

point9

Junior Member
Jul 26, 2003
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I know very little about OCing, so any help would be appreciated.

I purchased a new P4P800 DX with a P4 2.4Ghz and 2 x 512m PC3200 Crucial CT6464Z40B
I tried the Asus Ai overclock tuner in the bios and set it to 20%, the system posted @ 2.9Ghz and the memory showed @ 400Mhz .... and was stable. I then set everything back to factory to load the system.

Yesterday the MB failed to post, so back to the dealer today for a replacement.

I tried the same OC [20%] on the new MB, but the memory is posting @ 266Mhz ?
If I set it back to factory the mem posts @ 400Mhz again.
What am I doing wrong ?
I flashed both MB to the latest bios 1009.

Also, could anyone recommend a site to learn how the Dram timing thing works in newbie details plz ....