This is an entry-level build on a budget. I tried to stay around the $400-$600 range.
The 750Ti SC is a power-sipper, and performs quite well from what I've read. It's also cheap for what you get. The g3258 is kind of a no-brainer for a budget build. If you can OC it it will perform fantastically for a $70 dual-core (the Cooler Master Hyper 212 seems to be the way to go for a CPU cooler). 2x2GB sticks of ram should be enough, I would think. However, if you really need to it wouldn't cost much at all to go for an 8GB setup. I'm trying to get away with as much as possible for as little as I can, if you didn't already pick up on that. MOBO is also a dead-pick; it was made for the CPU. I'm not so decided on the PSU and tower, however. I think a 400W PSU would be enough for OCing capabilities, but I'm not sure as I don't have experience with this stuff. The tower I haven't got much clue about, either. It says there are no incompatibilities so I'm guessing I'd be okay with that tower. The mouse and keyboard are just something I saw that was cheap, looked decent, and had decent reviews.
Intel Pentium G3258, EVGA GeForce GTX 750 Ti, Deepcool TESSERACT SW - System Build - PCPartPicker
If anyone could tell me if I can run games like Arma II: DayZ or the standalone DayZ, as well as the FPS I can expect on LoL, Minecraft, Runescape, CS:GO, Diablo III, WoW, SC2, and Garry's Mod, that would be fantastic. I've done some research into what kind of FPS I can expect from a few games and I think I'll be alright, but not 100 percent sure.
If I've done my research correctly I should be sitting pretty for a build here. I'm just looking for others' thoughts and advice on the build. I'm quite happy with what I've set up here.
Edit: I have no clue for space and wiring and all that, if someone could educate me on what I can expect or a better tower I can choose, I'd appreciate it.