Here's HP's product spec's for your model:

http://h10025.www1.hp.com/ewfrf/wc/d...dlc=en&lang=en

Under video it lists: integrated in chipset, no AGP slot (funny it doesn't give a MB value, Cracked Axe gave good advice to find that)

if it (the vid device) is less than 64MB, your machine might have some trouble fully displaying R:TW. However, I see that you have 3 PCI slots, so all is not lost - a separate video card can be purchased (and installed quite easily, by you), to upgrade your machine to the more robust video requirements of current games.