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After connecting new PSU PC beeps and shuts off

Last response: in Components
November 28, 2012 9:27:55 PM

New PSU: Thermaltake SP-630P
Old PSU: Chieftec GPS-450AA-101A
Motherboard: Asus P5QL-E

When I turn my PC on it almost immediately starts beeping (short ~25 beeps) and then shuts off. My old PSU has only 1 4pin ATX connector, new has 2, I tried connecting them both and only one, but it didn't help. After reconnecting old PSU everything works fine. What could be the problem? Could PSU be faulty or my motherboard not support it?
November 29, 2012 12:09:39 PM

Is it possible that BIOS doesn't recognize new PSU? Maybe BIOS update would help?
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