i7-8700K to 5 5600X - RTX 2080 performance halved in CPUs, Motherboards, and Memory Posted November 13, 2020 Ugh, is this one of those AsRock things again... You could ask AsRock. Someone else had BSOD issues with a riser card that needed pcie3.0. "BIOS > Advanced > AMD PBS > PCIe x16 Bus Interface (Auto/Gen1/Gen2/Gen3/Gen4)" Pasted from post. If you happen to have MSI afterburner you could check if the GPU can boost where it should. And if you still have BOTH systems up and running check if the clocks match. One thing you also could do is install older GPU drivers and check does that help, something like 3-4 versions.