Water cooling the VRM's may not help anything, but I like mine being 29c and not 48c. Unfortunately my monoblock doesn't water cool the PCH. It still runs in the 40's. What I need water cooled is my M2 drive. It's right under the GPU's and right now is at 46c, but the system is outside of a case now so no air is flowing over it. IMHO. the GPU's are the components that benefit the most from water. My load temps are half what they were on air. 1080 FTW's that won't even hit 40c at 100% load. On air my top GPU was always like 11c hotter than the second one. Now it is 2c cooler than the second. I wish the CPU temps were cut like that.