Just ordered a Radeon HD 7870 to replace my old GTX295. Now I'm worried the old mother board cannot handle it while gaming. It's a i7-920 @2.67 GHz from Dell (so I can't overclock it). Will I have any performance issues with the new card due to the motherboard on games like Diablo 3, the Witcher 2, first-player shooters, etc.?
The only decent Cooler Masters are the SilentPro series. I would go with something from Antec, Corsair, PC Power and Cooling, Seasonic, or XFX. They all make quality products and you don't want to skimp on your PSU. It's the most important thing in your case. It can ruin hardware if it fails.