OK, I ended up getting the Athlon X3 455 and I bought a Galaxy GeForce GTS 450 1gb DDR5 gpu. I had no problem getting the processor to work, but when I installed the gpu into the motherboard it couldn't detect my monitor. I installed the latest drivers from the manufacturers website, but it didn't work, neither did the CD that came with the graphics card. When I booted the computer up using a VGA monitor running on the on-board gpu, it said it successfully installed the graphics card but it could never detect the monitor. (The other monitor being a HP w1858 DVI monitor.) My mobo is Gigabyte M68MT-S2P. The GTS's instructions for installing it says "Connect the appropriate power to the graphics card (if needed.)" and I don't know what that means. (It came with a 6 pin connector but I don't know what it's used for.) ... If someone could get back to me as soon as possible, that would be most a appreciative. Thank you in advance.
(My username indicates exactly what I am at a certain sense.)