I just got me a new pc for $3 and it works great, however I was wanting to know if a new graphics card would handle on this machine, it is a emachine et1161-05 mcp61pm-gm motherboard, amd Athlon 64 2.4ghz, onboard videos , is nividia GeForce gt450, 4 gb ram not sure speed of ram, I have nividia GeForce gt630 4gb ddr3 would it work in my system, I just want it for minecraft, only pc game I play, and onboard video isn't good enough for it, my pc runs max clock, I have pcie-x16 port, just wondering. or would you suggest upgrading my ram I have more ram and higher speed ram.