I just changed from2 loops to 1. Im def getting bettertemps on my cpu, about 5c lower. Before i had the cpu and mobo on a RX480 and my 2 xfx5770's on a EK240. I changed my cards for 2 470's ( running 1 atm) and put everything on 1 loop, still using same rads and pump. And right now my 470 is idle at 29c, and its pretty humid here. Sure that will change when i add the other 470, but im happy