Framerate drops after a loading screen
Sorted it, Installed MSI Afterburner and forced 1v. (Which is what it should be anyway, but eh.)
I then swapped my cards and managed to get an OC to 900/1800/2100 at 1.1v, so I’m pretty happy.
If anyone else gets this problem, just try and force a voltage. Not neccecarily higher, but just forcing one seems to work.