It's clear. Hawaii/Grenada's performance in DOOM is literally doomed. I have R9 390, i5-4690, 16GB RAM and my framerate is all over the place. There are also complaints from people with Tahiti Pro, XT and XTL GPU's. Here is an official benchmark, look at 380 and then scroll down for 390. This isn't normal! 390 knocks on 770 performance. That's ridiculous.