I need a power supply that can run a GTS 450 without a problem. I'm looking at this Coolermaster 500W Elite PSU and it seems it's enough for it. I just need to know the amps on the 12V rail and if it can power up the 450. I'm in the UK and it is £29.99 in Amazon.co.uk.
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Stay away from coolermaster power supplies! They can not deliver their rated power. Look at some reviews on www.hardwaresecrets.com, click on power heading, and go through the list of power supplies that will fit your needs.