The 92mm fan on the heatsink is actually full size. There is some recirculation from two sides of the fan that don't have a rubber grommet at the attachment point. However, I can definitely feel cold air being pulled through the side panel. Honestly, I think that it's a simple matter that a 92x25 at 1600 RPM is not going to pull enough air.
The bottom fan does a good job moving air out of the top of the case, which also benefits from natural convection. If it didn't, the mechanical HD I have in the quick bracket would overheat due to the backflow of the GPU while gaming. That's not happening, and it stays cool. The 92mm fan at the bottom is, in my opinion, a must if you use a GPU.
I did another round of heat testing. I've been encoding Adobe HEVC for about 12 hours now, and measured the temp difference with the top on and top off. The result?
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There was no difference on any temp sensor that wasn't margin of error (+- 1C). Now the case itself stayed cooler, but that's not an issue. The case getting toast itself is a by product of it functioning as a heatsink for the case interior. If the components inside show no temp difference, than the case is doing it's job perfectly.
Later today, I'll do the same test with BF1 and PUBG.
