Three APIs, 61 graphics settings, over 200 options, and one serious man… Okay, maybe I am not always that serious, but Sam is, so it counts. I'm back again in Serious Sam 4 to look at how well it performs on the different GPUs in my collection, and to take a look at the graphics. Not too deep a look because there are a LOT of configurations that would need to be considered then, but hopefully deep enough. This does include looking at the performance impact of Variable Rate Shading, which offers a few options when using DirectX 12 and a supporting graphics card..