Hey guys, I just built myself a new high end gaming rig. Which has a amd fx8320 16gb of gskill ram at 1866 ,and also has one asus hd7770 2gb version. its all runing on a 1000w nzxt hale 90v2 ,and a asrock exteme 9 mobo. now what I was wondering was would I better off adding another hd7770 ,and crossfire them together or would it be better to go with a asus hd7970 direcu2 3gb. Any help would be apreciated.