I'm building a new rig soon and am having a hard time deciding between the 5770 and the 4890. I know, technically, the 4890 beats the 5770 performance wise (higher clocks, better benchmarks, etc). Though I know the 4890 eats up a crapload of power (isn't it 2x 6pin's?) and it runs quite hot. The 5770 includes dx11 (is it worth it?) and eyefinity which is cool and all but how many people actually use it? Not many I asume. But I also know the 5770 runs quite cool and is very energy efficient. I am planning to get an athlon or phenom quad core (2.8-3ghz) cpu. Would a higher clock dual core cpu work better for these cards? Thanks, - Devin