I'm thinking of buying AMD 7770. My main concern is if its compatible with my CPU. On the buying page the requirements shown are 2x 75 Watt 6-pin PCIExpress PowerConnector, 1x 75 Watt 6-pin PCI Express PowerConnector, Blu-ray, HDDVD, CD-ROM Drive. My specs are : intel dh55tc, intel core i3 540@3.07 ghz, 2gb ddr3 ram(gonna extend it).please join the dots for me.