I'm planning to build a budget gaming pc and I'm looking at the Cooler Master 430 elite case along with a phenom ii x4 965 (at stock speeds) and a 7850. Unfortunately, other than the front intake fan, the case doesn't come with any stock fans. I'm on a really tight budget here and don't want to spend unnecessary money on extra fans. Do I need them if I'm not overclocking anything?
Unless you've got other plans, I would get a 120mm for the rear to act as an exhaust. That Phenom II will still kick out a lot of heat under load and a fan blowing into the case just won't be enough, you'll need an exhaust fan to remove that hot air from the case.
I have that case and a Phenom II 955 but no GPU. With the Intake fan included and the mesh at the front is enough for my build. But with a GPU the temps will increase a lot, try to get another fan for the side.
Check another cases at the same price, sometimes you find something better.