So I am having some issues trying to run Destiny 2 with RX580 8gb in crossfire. I get about half the framerate as when I disable crossfire. I've scoured the internet and nothing seems to be working. I've disabled ULPS and tried all the crossfire profiles. Currently, I run at 1080p with all the settings maxed and get a steady 60fps (capped at 60 because my monitor is 60Hz). When I load in with crossfire enabled, I get 35ish with all the settings the same. I have a 4K monitor and want to get a steady 60fps at a higher resolution. Any idea on what to do?
The only thing I haven't tried yet (which I don't think is an issue, but correct me if it may be), is that I use one power cable to power both GPUs. It's an 8pin from the PSU that goes to an 8pin and 6+2. It's a cable that came with the PSU, not a splitter or anything extra. Both GPUs are recognized by my system and both of them spin the fans when under load.
2x Sapphire Pulse RX580 8gb
ASUS Z370-A motherboard (2x PCIE x16 running at x8 with 2 GPUs)
Corsair 1200W Platinum PSU
Intel i7 8700K CPU
16GB DDR4 RAM
Any help/ideas would be greatly appreciated. Thanks!