I currently have a slim-line PC I bought real cheap. http://www.abcwarehouse.com/product_catalog/pc_proddetails.asp~prod_id~34788# I paid $200, not bad. Well, the case is Custom, as is the internal power supply. The video card is lacking, and I know there are quite a few pci-e low-profile cards that I can put in, but the power supply on the PC is only 220W, and a few of the low-profile cards require 300,400, etc. (I have a good gaming laptop already, this is just for my girlfiends/home use) I know the max ANY video card that I can use is like 150W, but I have no idea on the actual computers load. If I get one that "requires" 300W, and I do something intensive, what would happen? Would it just shut off? Would it fry the power supply? Is there a fuse somewhere? Etc. Anyone know?