I would advise against mining with your CPU. It will not come close to hashing enough to cover the extra electricity it uses, and will generate more heat inside your case, in turn heating up your GPU which could cause it to throttle or at the very least shorten it's lifespan.
Ah thanks. I was wondering about that. I'll probably shut down the CPU mining and see if I can squeeze more speed out of the GPU to make up for it.