Question about EliteGroup P4VMM2 Motherboard

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Are all P4 478pin cpu's compatible with the P4mm2 motherboard?

I attempted to remove cpu heat sink for cleaning. The processor was stuck to the heat sink, and I damaged some pins. My damaged cpu is a P4 2.66ghz/512/533 for 478 socket. I am searching for a replacement and was wondering if a P4 2.8 or 3.06 will be compatible? Thanks..

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Re: Are all P4 478pin cpu's compatible with the P4mm2...

Just in case your pins are only bent you can straighten them out as long as you are careful. Take a mechanical pencil without lead (.5 works ok but .7 may be easier to use) and ground it by touching it to your power supply. Then work the CPU pin slowly into the pencil and slowly bend the pin up. If you?re patient and careful you can usually straighten out any pins that have been bent. You didn?t stat which version motherboard you had. On the P4VMM2 (V1.3) motherboard the manual states that the motherboard will automatically determine the CPU clock and system buss frequency and makes the appropriate changes. The manuals only references a front-side buss limitation of 400 MHz, however, a FAQ from the manufactures support site says the V1.x motherboard?s CPU is limited as follows: - Pentium 4 400Mhz FSB (256K/512K L2 cache) CPU ? 2.6GHz - Celeron 400Mhz FSB (128K L2 cache) CPU ? 2.6GHz I would stick with the FAQ recommendations if you have to purchase a new processor, that or contact the support line to verify. Make sure you point out the FAQ on their site since they will probably just refer you to the manuals specs. P4VMM@v1.x CPU FAQ: Let us know if you have any other questions and please don?t forget to rate the posting.

Posted on Jan 14, 2007

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Hello Ron - The two most likely possibilities are that you either did not seat the CPU properly in it's socket (misaligned or bent pin) or that you did not fasten the heat sink properly, or remember to plug the heat sink power connection into the motherboard power connector.

With the heat produced by modern CPU's - without the proper cooling they would melt down almost instantly that's why both Intel and AMD have built in overheating protection which keeps them from even starting if not cooled correctly. When replacing the CPU it is always good practice to apply some new thermal paste after cleaning off the old.

I suggest you try starting the machine with the cover off and see if the heat sink fan is turning. If not that's at least part of your problem. If it is turning I would remove the CPU (careful of static!) and examine the bottom carefully to make sure nothing looks damaged. If it looks normal I would try reseating the CPU slowly and carefully.

In your question you did not say why you removed your CPU. Where you upgrading it to a new one? If so are you sure it is compatible with your motherboard?

Here is a link to HP's info page about your motherboard, including upgrades. Click Here.

It's also a good idea to clear the motherboards CMOS when removing and installing a CPU. The same page has a clear description on doing that.

Please follow the steps as I've presented them below:

1 - examine the info at the link I presented. 2 - make sure the fan is working - If so then - 3 - remove the CPU, examine and if it looks OK replace carefully (It should take hardly any pressure for a CPU to fit into it's socket.) Thermal paste would be nice but there's probably enough on the CPU (unless you've wiped it off) then you would need to get more paste before proceeding.

If that list doesn't help then it's time for a call to HP/Compaq tech support.

Good Luck,

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