I would lean toward a no... considering the output on the 12 volt rails.
+3.3V@20A, +5V@24A, +12V1@14A, +12V2@15A, -12V@0.3A, +5VSB@2A
But for me to be exact, I need to know all about your PC. If it was a store bought OEM like Dell or HP, tell me the make and model and any other upgrades you have done.
If you build it yourself, please list all the components.
CPU? Board? RAM? How many hard drives and optical drives?
Please be specific.