Well I've found out the erratic GPU usage on MSI afterburner is due to v sync on fallout 4. Its easy to turn v sync off on an Nvidia gpu but not on an AMD apparently. You have to edit a .ini file to force v sync off.
I found this out by playing bioshock infinite for a while with v sync on and it was the same thing on after burner with the gpu usuage up and down constant, but with v sync off the GPU usage was stable.
I'll give it a go when I get a chance.
I found this out by playing bioshock infinite for a while with v sync on and it was the same thing on after burner with the gpu usuage up and down constant, but with v sync off the GPU usage was stable.
I'll give it a go when I get a chance.