Overclocking the i7 6700K on a B150 board.

Im looking to squeeze a little bit more power out of my skylake chip but I'm unsure about how I can safely overclock my chip on this board. Overclocking settings are technically there in the BIOS, but im unsure how much voltage I can push through the chip given the amount of VRM's on the board. Also, can CPU Core/Cache voltage still be set to auto if I only put a slight overclock on it? I don't think I'm going to get too far with the power delivery on the board.Im not worried about any temperatures on the CPU. The chip is water cooled.