Compute Unit

It's where compute happens

7900XTX has 96 compute units (48 work-group processors)

More info https://hothardware.com/photo-gallery/article/3259?image=big_advanced-graphics.jpg&tag=popup

These CUs run RDNA3 code which is quite well documented

https://www.amd.com/content/dam/amd/en/documents/radeon-tech-docs/instruction-set-architectures/rdna3-shader-instruction-set-architecture-feb-2023_0.pdf