thanks for the reply CoolDude X ...yes I have upgraded the smps to 700W and changed the cabinet .here is a link to my pc (STOCK VERSION WITHOUT ANY CHANGES) http://www.cyberindian.net/2009/07/20/dell-launches-inspiron-535s-slim-desktop-pc/ can u PLEASE check this link and tell if I can use the graphic card
Do not waste money on upgrading the GPU. With the sort of processor and the Ram , they"ll bottleneck the GPU. I would suggest you to upgrade the whole system.BDW what graphic card are you trying to use?