Allen
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Joined: Oct 1999
Posts: 8,841
Ohio USA
In Doom and Fallout 4 at 1440P at ULTRA settings (games of interest to me), looking at the entire timeline plot (averages can be misleading) of FPS vs Time on one site, RX-480 is equivalent to R9-390 and barely exceeds GTX 980.
The RX-480 tends to win at points where framerate drops to lowest levels (where FPS becomes most important). Framerates in roughly 40 - 50 range (more than enough for me at 1440P ULTRA).
That's what the rumors have been predicting (in my reading of the rumors). So far, so good on the test reports (in my reading of them -- others may have a different opinion).