[SOLVED] Is the RX 590 really this weak?

box o rocks

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Apr 9, 2012
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When I bought a RX 590 for my old FX-8350 (4.6GHz), I expected that the old CPU would bottleneck the GPU, but what the heck. I went for it.
However, I was playing Obduction on epic settings (1920x1080) and had MSI aferburner running... the 8 cores were really low in usage. 30-50%. But the GPU was maxed out most of the time at 99% usage! With some stutter. I'm kind of shocked. I figured that the CPU would bottleneck the GPU, not the other way around. Does this surprise anyone else?