Hmmm that seems a little slow. Is that with the full test? I think software optimizations for compute on RDNA just aren't there yet.
Actually now that I think about it, that isn't too bad. My jacked up Radeon VII does the same test in about 266s, or 4 minutes 26 seconds.
Maybe it was the psychological effect of my typo of 5:34:55 instead of 5:34.55 ?