I need help in deciding which graphic card i should buy. i have the possibility of getting Zotac GeForce GTX650 Synergy ed. 2GB DDR5 128Bit V2 vs GIGABYTE Radeon HD 7770 OC, 1GB, GDDR5, 128bit ... ill use my new card mostly in gaming on a 1280x1024 res monitor 75 Hertz. These are are almost...