Devil may Cry is not a very graphically demanding game- most GPU's could run that. But a 8500gt is very outdated, and it is not a gaming card. You might be able to play it on low settings at 1024x768 but I would recommend something a little more powerful, say, a 9600gt or ATI 4670 if you're strapped for cash.

Evil Assasin- Yeah u should be able to play it with med/high settings if you lower the resolution to around 1280*1024. Possibly lower but you should be able to play it smoothly

btw is there much difference between a 9800gt 512mb and a 9800 gt 1024mb?

red bars= fps(frames per second) for good performance u want 25+ fps