1: Unigine Heaven and Unigine Valley for GPU stress testing (both free versions will work)
2: MSI AfterBurner would be best IMO but either will work. There is also Sapphire Trix which is pretty good too.
Thanks it isn't as complicated as overclocking the CPU right? Also is there an actual guide for it or should he be just playing with the voltages according to the stress test? Also is the HAWK version as efficient as a lightning version? Also in afterburner he can't change the power output in percentage.
One more question: would it be okay overclocking on the asus b85 mg?