Posted 14 May 2010 - 04:18 AM
It depends on whether or not the 12 volt rail on the power supply, supplies enough amperage. At full power draw, the 9600 GT uses 96 Watts, on the 12volt rail.
You have to do some math to figure it out. Take into consideration all the devices on your system that use the 12 volt rail such as drive moters, fans, the cpu, graphics card...(you have to do some homework to figure out how much those devices draw, just look on the devices) If a cpu uses say 60 watts at max power draw, that means the cpu is using 5 amps off the 12volt rail. You divide the watts by the voltage rail used. If you have a max. of 15 amps available on the 12volt rail, then this means you've just used 5 amps and have 10 left. However, you will not be able to pull max. amperage from all voltage rails (12, 3.3, 5) simultaneously.
Look on the manufacturer website of the cpu, to see how much wattage the cpu uses..
Keep in mind that devices on your system will likely not draw maximum power simultaneously, unless you're doing some hardcore stuff. But generally, when I calculate the amperage needed for each voltage rail, I assume maximum power draw, to leave room..
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