[exabrial]

SRAM and HBM are two completely different things though... SRAM is what your L1,L2,L3 caches are made of (most of the time, asterisks exist). This is something we've been doing for years and is a proven technology thats unbelievably cheap. It's all part of the processor.

HBM are their own chips and dies.

[kcb]

SRAM is still high bandwidth memory...it's literally the most space inefficient and expensive type of memory.