SURVIVOR KEEPS CRASHING AND FREEZING PC

LowLevelFatalError [File:Unknown] [Line: 686] hr failed at D:/depot/r8branches/r8release/Engine/Source/Runtime/D3D12RHI/Private/Windows/WindowsD3D12PipelineState.cpp:912 with error DXGI_ERROR_DEVICE_REMOVED with Reason: DXGI_ERROR_DEVICE_HUNG

WHATS WITH THIS **bleep** ALL OF A SUDDEN