I'm not so privy on the electrical engineering thing... but NVIDIA is said to be working on a card with 16GB of HBM. Could HBM be use in CPU architecture? Instead of buying a CPU and ram sticks you buy the CPU with HBM on it something in the range of 16, 32, or 64 GB of it? The system should still be able to access it via the CPU. It would greatly reduce the foot print of a system and increase system speed. The only draw back would be the need to upgrade your CPU if you need to upgrade ram.