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12v Motherboard Connectors and Pentium 4

Aikouka

Aikouka

Lifer
Someone asked me today why P4 machines stop working after a while when the 12v connector is not connected. Now, I'm no Intel expert, but after recalling some readings, I mentioned about how Pentium IVs run off the 12v rail, and most likely the motherboard (if equipped with the 12v connector) expects the extra power, and quite possibly the computer is underpowered the whole time while running without the P4-compliant PSU.

Is my finding correct, or is there another technical reason that causes the motherboard to stop functioning after a while? I was told that my college's awesome tech department happens to build P4 machines without P4 compliant PSUs (has 12v connector) and they have 12v mobos, but refuses to spend money on getting the correct power supplies ... yet wonders why their machines keep malfunctioning.

Thanks for any information you can give me, and I know the Athlon processors run off the +3v rail, so would not connecting the 12v connector to boards that are equipped affect an Athlon as well?

-Will
 
I read that both AMD and Intel CPUs now draw off the 12v line, and having used boards for both that utilize the 12v connector, I can say that from my experience that failure to use the 12v connector with a typical system config and fairly fast CPU will result in nothing but problems. It needs that extra juice and even if the system is running OK most the time a heavy load will in all likelyhood make the system fold.
 
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