your completely wrong, 99% of graphics cards with DVI ports can run 1920x1200 which is the native res of your 23" displays, I run mine off a radeon 7500 and it works fine natively. the res which the card can do is not an they could do stupidly high res's if the port has a bandwidth, it's not like your not "utilising the cards power", it's the bandwidth of the port and at the moment the maximum single link DVI can do is 1920x1200, dual link DVI can do 2560x1600 out of the 7800GT so you'd need a 30" to "utilise it", (it can do higher it would just sacrifice the refresh rate, eg it can do 3840 × 2400 at 48Hz, oh and when i say the refresh rate with lcd's it's more like the frame rate).