It will work at 720P, but its not up to 1080 specs. And it should work right away, since it has a high resolution, which basically means it's HD ready.I am going to bypass the videocard and do cablebox DVI-out to Monitor LCD-in. At 1680x1050, I think I can probably get 720p HD output. Does my monitor need to be a "HD" monitor, or is HD just based on the resolution of the monitor?