sorry if I'm wrong thread here I am still new and I want to assemble or upgrade a PC but the budget is not sufficient if overall therefore I upgrade slowly here my pc spec is Intel Core 2 Duo E8400 RAM 2GB 2X1GB DDR2 ECS G31T M7 Onboard VGA GMA 3100 PSU and Case Simbadda 350W the option I want to upgrade is VGA GTS 450 PSU cooler Master 400W Second Is the Intel Core 2 Duo E8400 with GTS 450 and 2GB RAM not bottlenecked? and are there other options to upgrade slowly sorry if it stands for