THE BATTLE for VRAM dominance needs settling this year. With both Nvidia and AMD utilizing GDDR5X and HBM 2.0 in their product lineups, which is best, and what will we see on the GPUs of tomorrow?
Each has its advantages and disadvantages. HBM 2.0 takes up less PCB space than typical GDDR5X stacks, runs at 1.2V, has an incredibly low latency, puts out an astonishing amount of bandwidth (242GB/s per stack versus GDDR5/X’s 44GB/s), and, more importantly, features Pseudo Channel mode, which splits a memory channel in two, with one pseudo channel dedicated to memory reads, and the other to writes. Think of it as multithreading, but for memory, and solely dedicated to read and writes, as opposed to processes.
That said, it has issues: It’s expensive, in short supply…