I recently purchased another 4890 pcs+, as I already have one and therefore can crossfire them. I have a phenom 955 4gb ddr3 ram and a 750w xfx psu. Now I was expecting to see a nice increase in fps when playing games such as crysis and black ops, ( I know there have been some crossfire issues with BO) however when I actually enable the crossfire I actually loose 15-20 fps in game. Yet on 3d mark vantage my system gpu scores like 18000 which is higher than the single card. So I can get to the bottom of what it is? Any help would be much appreciated!
Thanks in advance
in ati catalist, set everything on "aplication controled" catalist AI on default, tripple buffer enabled. then check and see if u have CrossX in games. thats solves my problem, i also have 2x4890.