@LtMatt I ran with just AMD Wattman. Rendering 2560x1080 the GPU was ~200W (Think it was more like 180W) using Wattman GPU PWR sensor. Wattman has no voltage measuring so I can't give exacts, but it'll make sense that it's doing the 1000MV I set it to. Soon as I render 4K it just smashes up, obviously ignoring 1000MV and hitting 300W and suddenly unable to keep itself cool. MSI AB is off my PC. It's just the AMD driver doing something stupid with the GPU Vcore when it renders 4K for example. I'm just going to have to leave the power limit to 0% so it'll stick at 200W without trying to kill itself.