Coolermaster is not a bad brand, and is certainly preffered by many other manufacturers. It is just that other brands like Corsair, Enermax, Seasonic build PSUs of better quality. Try it and and see if it is stong enough for your system.
If it fails, consider a Corsair GS or TX series PSU.
Thanks for the help. The Cooler Master was a replacement for a Hyena PSU which blew up causing a nice little light show.
Hi Kitd - A little sidenote - the Coolermaster 500w is on 'johnnylucky.org' lemon list due to a review by Hardware Secrets,
however the problems(efficiency, ripple, noise) don't appear to be it's 500w rating.