I have been using my dell optiplex 780 for awhile now and i am going to purchase a new graphics card (HIS Radeon Hd5770) so that i can play fps games and rpgs. I have been able to run halo and left 4 dead but left 4 dead is quite laggy on a hi res. I would like to play games like cod black ops, crysis, left 4 dead 2, Aion and games of similar standards. Here are my specs: Win 7 pro, Intel(R) Core(TM) Duo CPU E8500 @ 3.16Ghz 3.16Ghz, 3 gigs DDR3 RAM and an onboard graphics card (I know). Can someone please ensure me that i will be able to run these types of games after i have purchased my hd5770 graphics card. Thanks 