M4 efficiency is stunning. First machine I've tested getting over 5 Gflops/W with HPL, and in fact it goes beyond 6 Gflops/W... with fan only spinning up to a quiet 2500 rpm.

Maybe this is why Qualcomm abandoned their marquee Dev Kit—it is thoroughly trounced by M4.

@geerlingguy eh, MS still sold the previous devkit despite being wrecked by Apple, my guess is that the devkit had even more serious issues than just the wonky HDMI port we were led to believe