I finally came to the decision to build a PC rather than buy one (great decision) and I put together a build, Could I get any advice or opinions on it. If you have any recommendations for part changes, my budget is around $750 before mail-in rebates. Link: http://pcpartpicker.com/user/SenseiGhostly/saved/8xY2FT This is my first post ever since I joined a little over a year ago so my name is really immature.
A 6300 will get rekt by BeamNG. Just spend some more and forget about upgrading your CPU. Buy an ASUS Z97-A (Z97-K if you are really tight on the budget, it's mostly the same but not so good for OCing), and a 4690K. It's over $100 more, but it's totally worth the money. Also don't waste $7 on a thermal paste, it will be 2C cooler at best. Not worth the money. Cooler master's paste is good enough. Rest of your build is just fine.
You'll need a more powerful psu for that graphics card. Nvidia recommends a 500W power supply but I'd go with a 550W or even a 600W power supply just to be on the safe side. I have an FX 6300 and honestly if I had to build another PC I'd go with Intel.