Question about XION PSU XION|XON-800R14N 800W RT

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Whining sound with xion 800 watt power supply.

I replaced my blown 600w xion with an 800 Watt version. When I start the PC I get a high pitch whining noise. any ideas what that is? do you know where I can find an installation schematic. The new supply has nicely loomed wires. I doubt the fan is rubbing a wire.. any help on installing would be great if you could recomend a source for instruction. Thanks,

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There is a fan insine the power supply, and also a fan on the CPU. Occasionally there is also a fan on the chassis of the computer itself.

Turn on the computer, take the case off, and listen to identify the source of the noise. If it's inside the PSU, return it and get a new one.

Posted on Feb 20, 2009

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If the computer turns and works (other than the noise) then the wiring is correct. The ATX plug should be keyed so it is almost impossible to hook up incorrectly, and the wiring is for the most part standardized. However, there could be a problem if it is an older computer and your replacement power supply is from a Dell. Dell ATX power supplies, mostly from the PII to PIII era were not wired to the standard ATX pinouts. So, if you put a non-Dell power supply in an older Dell, or if you put an older Dell power supply in a non-Dell PC of any age, your wiring will not be correct. Usually incorrect wiring means either it fries or just doesn't start at all.

Specialized PC's or high end servers may also use non standard power connectors.

If you paid less than $40.00 for the power supply, the problem is most likely just a bad / poorly made power supply. Most of the budget power supplies are extremely cheaply made. They will sometimes have a lot of noise/whine/hum, and often fail quickly. In a lot of cases you will be able to tell the quality of the power supply just by the weight. The cheap ones are usually as light as can be. A good power supply will have some heft to it, as it will have large heatsinks and heavy duty components. If you have a Radio Shack nearby you could pick up a Thermaltake 300 to 450 watt power supply and try it and see if the problem goes away. They have a pretty flexible return policy. If you have a high quality power supply, it could be that you just got a bad one. Try another to confirm. If you try a Thermaltake and it still whines (and never made noise before this problem came up) then it could be that other components in the PC are near failure--possible as a result of your previously failing power supply. My experience though has been that unless the power supply popped (as in literally blew out) the motherboard and other internals aren't usually affected.
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Here is a link to a wiring diagram for the ATX plug--just to be complete.
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