Question about ASUS P4P800 SE (890552603657) Motherboard

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Upgrade from P4 2.4GHz to P4 3.0GHz Prescott on P4P800

Doesn't boot, doesn't heat-up, no sounds, black screen, new 500W PSU. Putting old chip back always restores it to running condition.

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  • kris866 Dec 09, 2008

    I RMA-ed it and second chip behaved the same way. That's when I upgraded PSU from 300W to 500W but still no change.

    I'll try to play with CMOS, but that's a pain since I have revert to old chip every time I want to change CMOS settings.



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Playing with CMOS settings didn't do anything. I downloaded BIOS upgrade, although it was a Beta version, from the ASUS site and that seemed to resolve the problem, however only temporarily. Initially I overckloced it by 30% and it seemed to be happy. But, since my USB-TV stick didn't produce the right results (lots of clicking noises, picture jumpy, etc) I decided to bring it back to standard speed and that's when things started going bad and in a minute or two the screen went black.... motherboard was gone!
At this point my solution was to get new MOBO, new CPU (AMD), memory and SATA HD-in other words a new computer. It set me back by $325 but I have a Tripple core (if I remember the proper name for it) CPU, audio and video on board (I am not a gamer!?!!??), my TV stick works great and I'm happy. Here you have the full story.

Posted on Jan 06, 2009

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Sounds like the new CPU is bad. The only other thing that it could be is if there are some settings changed in CMOS. I would clear the CMOS and if that does not fix it then the new CPU would be bad.

Posted on Dec 09, 2008


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