Comment by jsheard
I might be behind on the latest counter-counter-counter-measures, but I know some of the leading AC solutions are already using IOMMU to wedge a firewall between passive DMA sniffers and the game processes memory.
e.g. https://support.faceit.com/hc/en-us/articles/19590307650588-...
I think they use hardware IDs of devices with IOMMU-incompatible drivers.