I was wondering if this build is balanced. Can I get maxd on most games?
-Amd FX 8150 BE
-GIGABYTE ATI Radeon HD6850 1GB DDR5
-GIGABYTE GA-970A-D3 AM3
-OCZ Fatal1ty 750W
-8GB G.Skill DDR3 1600MHz Ripjaw Series
-Kingston HyperX 120GB
The FX chips are not particularly good gaming chips.
Instead of the mediocre OCZ 750 watt PSU, I'd put the money toward a higher quality 650 watt PSU such as the XFX 50 watt PSU or the Corsair TX50V2 PSU. Even then, that is overkill for a 6850. A good 500 - 550 watt PSU is all you need.
The build is not good, the PSU is from OCZ...please stay away from OCZ power supplies...in fact...stay away from anything from OCZ. The FX chips have terrible lightly threaded performance (which is what games usually are), a Phenom II x4 965 3.4ghz is a better bang for the buck choice if you must go AMD. The motherboard is fine as long as you don't do any overclocking.
The HD6850 video card is also fine...keep in mind though that for some demanding games like BF3, at 1920x1080, you will need to play on medium detail to get 40-50fps (playable frame rate for that game). For others like Diablo 3 you will run them maxed out at 72fps and for games like starcraft 2 you will max them out at 38fps at 1920x1080.
Please remember that if you are dead set on getting an FX chip, many motherboards (including the one u listed), require a bios update. In most motherboards, you cannot update the bios unless you have a valid CPU installed. For example, if you have an FX chip and you need to update the bios for the motherboard to support the FX chip, well, you need to find an AM3 chip (like an athlon or phenom) so that the PC can run far enough for you to be able to update the bios.