i currently have gt 240 graphic card and im planning to upgrade to gtx 650 ti overclocked 1gb here is a screenshot from gpu z http://gpuz.techpowerup.com/14/04/02/3e2.png and can i change my current gt 240 with this gtx 650 ti and if i can will the pci-e 2.0 reduce the performance of the graphic card and how much %? Thanks in advance