Real-CUGAN on Linux vs Windows: same flags, two NVIDIA GPUs, SSIM 0.9977

The same 4K Real-CUGAN upscale on an RTX 2060 under Arch Linux and an RTX 4060 Laptop under Windows 11: SSIM 0.9977, PSNR 54.2 dB, no value off by more than 5 levels out of 255. Plus seconds per frame for Real-CUGAN and Real-ESRGAN on both.