The GTX 970 SC ACX 2.0 works at 1165MHz base, while the reference GPU base clock is set at 1050MHz. Nvidia's GPU Boost 2.0 takes on average the GPU clock to 1178MHz for the reference GPU and to 1317MHz for the SC card.
The overclocking potential is very good considering that this is a factory overclocked card. Using standard voltage and AUTO fan settings we managed to push the GPU 135MHz over the factory clocks. Memory overclocking is vital in any attempt to squeeze out more performance from a graphics card. The memory produced average results with a total 140MHz (effective 560MHz) overclock.