Sapphire AMD/ATI HD 7770 1 GB GDDR5 Graphics Card it has pci-e 3.0 interface so will my gigabyte 990 xa ud3 motherboard support it plz help i have an gtx 550ti graphics card currently and now i want to replace it with Sapphire AMD/ATI HD 7770 1 GB GDDR5 Graphics Card my screen resolution is 1600*900 and an cooler master 600 w smps plz help