I am planning on getting a Fractal Design Define R5 case. From my pas experience, I do not find the need to overclock my CPU, but getting a few more frames in games is better. Since the size of GPU air coolers are limited, I was thinking if I used a small water cooler (single 120), I could get a good overclock, while I use a cheap air cooler on my CPU. How well does this work against fancy coolers of different manufacturers on 970/980