I want to build a mini itx gaming pc in the Lian Li PC-TU100. Only small form factor gpus can fit, but they are $250. So, i want to buy the a10-7850k, and put in a dedicated gpu later. So my question is, without dedicated graphics, what does the a10 7850k compare to? Also, is there a way to shut down the gpu and let the integrated gpu take over when not gaming, to keep temps and noise down?