More cooling fluid does not mean better cooling performance. Surface area on the cooler block and radiator is what matters. Having a huge reservoir just means you have more fluid to "heat soak" before you can get a honest idle / load temperature. That's why early on a lot of less reputable sites were getting absolutely bonkers temp readings for AIO kits. They booted into windows, grabbed an idle temp after 30 second day of being fully logged in, the ran a single benchmark loop that lasts all of 5 minutes at most. Even the most anemic AIO coolers available didn't have time to fully heat up the entire cooler.[/quotemsg]
I get that it would take more to heat up, and surface area of the CPU block to tranfer heat, as well as a well deigned radiator can dissipate the heat better, but i was curious if a reservoir and/or extra volume would make much of a difference as well. The coolant temperature coming off of the CPU block would be higher than ambient, even in the case (assuming you have adequate air flow). All that tubing, larger tubing, metal fitings, and reservoir all add up to more surface area. I was just curious as to how much.
More day dreaming since I don't have the money, but I thought of a build using longer than average tubing. Other exotic cooling ideas, too. But wondered if more volume and tubing makes any difference.