Hey guys, new to the site. I just bought another 4890 to CF in my computer. I just wanted to know how I can tell if they're working properly? Yes, they are both showing up in device manager and appear to be working and I have deleted old drivers and downloaded new ones. I wanted to be able to get more fps on Battlefield Bad Company 2. I just want to make sure I'm getting all I can with what I've got. Btw, is 750W Corsair enough wattage? Thanks in advance...