Desperate to finally grab a few parts to upgrade my PC, I have hopes to be able to get a new GPU. I'm going with a GeForce GTX650 and a 450-500w PSU. My CPU: Athlon II X4 635, Motherboard AMD 785, with 2x2GB RAM, currently a 250w PSU. Can I use this graphics card and get some 2x4GB RAM sticks in a month? Will everything function and I notice a performance boost? Really trying to get the best within my budget. Thank you for any and all advice.