what's the best graphics card for my system under 60$
Specs
motherboard: BIOSTAR N68S3B PCI Express x16 2.0
CPU: AMD Athlon II X2 245 regor 2900 mhz
memory: 3gb DDR3
storage:Western Digital 250 GB HDD
PSU:650 watt Power Supply
Radeon 7750 will be OK, you should be able to find those for about $60. NVidia GT 730 in the GDDR5 64bit version if you have a tough time finding the 7750.
Depending on the game, you have a slower CPU for newer games (say last 3 years or so) but you are also looking a low end video card for gaming, so things should equal out. Will be slower but equal at last if that is what you are worrying about.