Interesting. Looks to be about 2.0mm wide channels with ~1.5mm wide channel walls, in a straight side-to-side config.
An off-the-cuff assessment tells me that it'd be about 2C better than a Maze 3, given that both the Maze 3 and Maze 4 were lapped properly, and installed on a ~80W CPU.
Does that roughly fit in with what you're seeing for performance Phaestus?
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