Im building a low budget i3-2130 w/ 8GB DDR3. I have a 300W PSU, and I have 2 graphics cards I can use, a 7750 and a 6670. Which graphics card can I use without having to buy a better PSU?
just use the 7750 it should be just fine
I'm guessing off the top of my head, your system will draw roughly 170~200w max. Like ragingh4vok said, you can go with the 7750.
You will be fine with 7750 I think but you could get a better card if you go for 4gb ram, depends if you really need 8gb but if it's only for gaming I'd say 4 is enough on that system.