Termie
Diamond Member
Actually, according to the benchmarks Termie posted, the 390X sees some major gains in minimum FPS, but the 290 does not. That implies that the game actually makes use of 390/390X's 8GB of RAM, which would also explain Fiji's poor performance. It might not be an architecture issue at all; possibly this game is just a gigantic memory hog.
I added a third page to the benches looking more closely at the 390X. It was no fluke. The minimums shoot way up under DX12, and it definitely seems related to VRAM.