did you accidentally set the jumpers for the CPU to settings that would overclock it? or did you try overclocking accidentally (chaning a setting thinking it was something else?)
another idea would be to contact Asus
or just download the newest BIOS from Asus for your board
I am running an ASUS P4P800S-X Motherboard with a P4 3.0GHz CPU, 1GB of DDR Ram consisting of two 512 chips, and an ASUS Radeon 9550SE VGA card.
Recently I started having problems on boot-up where during the boot sequence the computer would freeze when it reached the NVRAM check.
The screen will say:
DDR Frequency 400 Mhz
Checking NVRAM..
And then it stops booting up.
If I turn off the power and reboot it then gets past that part on the second boot sequence and shows the following message instead:
Overclocking Failed! Please enter Setup to re-configure your system.
Then I press F1 to enter the Bios Setup, exit the BIOS without changing anything, and the computer boots up fine thereafter.
This problem now happens every time I boot my PC from having been in a powered off state.
At first I thought maybe the Ram chips were loose so I took them out and swapped the RAM slots just in case, but that didn?t help to get rid of the problem.
Now I am thinking it may be a BIOS setting, but I am not sure what I would need to reset in the BIOS to fix the problem.
Any ideas would be kindly appreciated.

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