HBM is only usable with chips co-designed for it, packaged on an interposer with microscopic traces. An enthusiast is not doing anything useful with it unless they own a few TSMC assembly plants.

The CPU modules can be tricky, too.

Now, some enthusiasts are already hacking. Go to the Level 1 Tech forums, and you’ll find a group trying to reverse engineer AMD Instinct GPUs designed for server motherboards, dealing with locked firmware, soldering stuff, you name it.

…But you probably won’t like the end goal of the hacking: using them to run LLMs and other GPGPU stuff locally. They aren’t usable for gaming.