>>718229269
Works on my machine
But in all seriousness, RenoDX IS producing an HDR-encoded image, but somewhere along the way to your monitor, it gets misinterpreted as an SDR image. Suddenly, the 0.00 to 1.00 signal range that represents an image with a Rec.2020 color space and a PQ luminosity curve where 1.00 is 10,000 nits is being read as an image with an SDR color space, a 2.2 power law curve, and a max brightness equal to the set (SDR) brightness of your monitor.
I don't know anything about RenoDX or what it does to games, but if ever there is a solution to your problem, it will be telling Windows "hey, whatever you think this image signal is, it's actually Rec2100-PQ".