I have 2 HD6950 running 6ea 24" 1080P monitors. What Video card can I add to run a 40" 4K tv at 3840X2160 connected to the tv"s HDMI port & retain all 6 existing monitors? I have no problem pulling one HD6950 if I can maintain the complete monitor setup. I do have one open double PCIe 16 slot & 800 watts power. One concern is that the HD6950 uses a different Catalyst suite than the 4K cards I have looked at.