1440x900 is 19" resolution and 2 4870 x2 isn't needed. I have a single 4870 x2 on a 22" and I play games fine. Plus for dual video card setup, it's gonna swallow loads of wattage/amps. You will need a 1000W+ for 2 4870 x2 since both of those will use atleast 650w idle/load.