1- What mobo do you have?
2- What is your budget?
3- List all the specifications of your rig. GPU, CPU, PSU, HDD, RAM, Mobo and Case.
Here is as much info as I can find
AX1300-B1880A; AMD ATHLON X2 7450 2.4GHZ 2 X 512KB L2 CACHE, VHP EN/FR CA