Originally Posted by Sisaroth
TL;DR (make some nice paragraphs if you want people to read your post), post based on thread title:
Only delta T matters in heat transfer so room temp matters a lot. Without throttling or FAN speed increase, the temperature of all your components will increase by the same amount when you increase your room temp. (+10° room temp -> +10° CPU temp)[
That' not even close to true, technogiant built a vapor chamber cooling with -40 temps, the highest overclock he got was somewhere in the realm of 40c core temps. You have to factor in heat density of the device being cooled, efficiency of the device cooling the component in that how fast does it remove the heat, relative delta temps, and the rate at which the median (air or water) is moving away from the device.
10c higher ambient might give you around 10c higher COOLANT temps, but it won't be exact, things just aren't linear. The higher coolant temp will make the CPU hotter, hotter silicon is less efficient at moving electricity which means more energy is lost as heat. That's just one factor, there are TONS in calculating heat transfer in the various parts of a liquid cooling loop.
The OPs purposed idea has been done, you could at least bother to read the last 3 posts.