Modern graphics cards (NVIDIA RTX or AMD Radeon series) use drivers that CS6 does not recognize, meaning you won't be able to use hardware acceleration for rendering.
While it's still possible to find Adobe After Effects CS6 available for purchase or download from authorized resellers, I recommend exploring alternative options, such as: adobe after effects cs6 serial number pc
Moreover, why risk it? Adobe has made high-quality, legal entry points for PC users that are either completely free or surprisingly affordable. Modern graphics cards (NVIDIA RTX or AMD Radeon