And with unified memory, you need to share with the GPU, which will have at least 2x framebuffers at full screen resolution and bit depth, as well as any/all re

And with unified memory, you need to share with the GPU, which will have at least 2x framebuffers at full screen resolution and bit depth, as well as any/all required texture memory, shaders, etc. Likely won't even have anywhere near 8GB for the system to use.