Why on earth would you even try using 0.5x internal resolution? Not only is it bound to break at least something, it will make it look worse, while still having to rescale things, so giving little to no speed boost.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
