I have a Nzxt Kraken X61 currently cooling the CPU (i54690k oc'd) and a GTX 970. I was thinking since there's room I'd add a second cooler (120/140mm) with a G10 adapter to the GPU the question is which rad would be better for which component. The GPU tends to run hotter so I'd assume that attaching the 280mm rad to it would be the most sensible. Has anyone done this and knows what works best?