I have an older HP P6000 AMD Athlon II x4 650 processor 3.6 ghz with 12 mb ram. I did have a GeForce GTX650 video card with 2048m gddr5 PCIE. It went south on me. Computer would not boot until I remove the card. I would like to replace the card but was wondering if the GTX650 with 2GB would work in my system? Or can I only replace it with the older video card? Thanks for any help.