Hi guyz, i need some of your expert advices. sorry for being noob.. Im planning to upgrade my video card but i am having a hard time thinking if my PSU would handle the new videocard with my system. Here are my specs: Intel Core2Quad Q8400 @ 2.66 ghz Asus P5kpl-am se 2x2048 MB DDR2-800 Corsair H50 Sapphire Ati Radeon 4650 (1) 7200 rpm SATA HDD (1) DVD-RW AOC 18.5" Monitor (1366x768 max resolution) 6 fans Acbel IPower 510(450 watts) PSU - (http://www.acbel.com/eng/Product.aspx?id=48&&sd=31&&pid=182) I want to upgrade my old videocard with an Ati Radeon 5770 or Ati Radeon 5850. Would my PSU handle the power requirements for the whole system?? Would really appreciate for all of your responses..