Now finally some results! First up, the individual configurations testing.
Both blocks have a definite orientation preference–the Sapphire Rev.A likes having its outlet to the top left (away from the GPU slots and RAM slots) while the Luna Rev.A prefers having its outlet at the top right (away from the GPU slots, close to the RAM slots).
Now that we’ve figured out what the best configuration is for each block, let’s chart its performance over the entire flowrate spectrum.
Note: I do 5 mounts at “Medium High” then take the best config of a block and test the whole flow spectrum (after a TIM curing session) then realign that curve with average of the 3 median mounts to give you the “Adjusted” data.
More graphs for your enjoyment…let’s start with reusing the flow vs. temperature data, but including pump heatdump (i.e., CPU vs. air temps). I have two iterations of it: CPU temperatures vs. my air temperatures and a setup with my water-to-air delta included twice more. The latter is to mimic a setup with one third the radiator power of my setup (roughly a 120×3 radiator with 1600RPM fans).
Note: these results are derived from adding the water-to-air delta three times to my water temps. I add them three times to emulate the radiator power of a loop with 1/3rd the radiator power mine has. I use 2xMCR320s with push-pull 2200RPM Yate Loons and the data emulates the conditions of a loop with a single 120×3 radiator with ~1600RPM fans.
Here is a pretty fun result…though neither block is great thermally, the Sapphire Rev.A is amazingly low restriction. I broke 4GPM with my pump setup, and over 2GPM with just my ‘normal’ setup. The Sapphire Rev.A is also the second most low-flow resilient block I’ve tested so far (behind only the Apogee XT). On the other hand, the Luna Rev.A is very restrictive and does not like low flow. At every pumping power setting I tested, it’s the worst performer. Ouch.