I use to play Chernobylite on two computers:
PC1 = Cross Fire of R9 280X = 2 X Tahiti GPU.
PC2 = Cross Fire of HD7990 = 4 X Malta GPU.
On both machines:
Only GPU 1 running. Performance Display and Recording are impossible. GPU-Z see crossfire of two or four GPU's.
Seven64 + last legacy 2021 May Radeon Software.
AMD Team is thanked by Chernobylit authors.