I have 2 HD6870's. One video card works perfectly. The computer recognizes the second video card but doesn't detect any displays connected via DVI. I only want to enable the monitors and extend my desktop to them. I don't need them for gaming. I don't need AMD Eyefinity Display. The Catalyst Control Center does not recognize the 3rd or 4th display. Neither does Windows 7 Home 64 bit - Control Panel.