Just bought a 22 inch display running 1680x1050. Upgraded from 15 in. Screen now seems to redraw slower. Methinks the graphics card may be the cause. Currently have a nvidia 5200 agp 128mb. Running on p4 2.6 w/ 768mb ram. Now considering upgrading graphics card to 7600 to alleviate slowness in redrawing screen. Good idea?