_:n6c8e065ec45c43b6bfab09e245732ccexb42
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"Another way to put it: It seems the latency was optimized for a very specific frequency range. Zen 2's memory subsystem wasn't planned to work at frequencies higher than Zen 2 was designed for.\n\nWasn't this established pretty quickly after the processors came out?  Using memory outside the 1:1 FCLK range requires a massive overclock to offset the latency penalty to exceed throughput at lower speeds with 1:1 it's rarely worth it.  And in games it may not be possible to recoup the latency loss.  So basically you're stuck w/ 3800 memory on a 1900 FCLK if the chip can handle it (or possibly a few ticks higher)."
<https://forums.anandtech.com/threads/video-ryzen-7-3800x-5ghz-vs-core-i9-9900k-5-ghz.2580198/>