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Thread: HBM2 vs GDDR6 ?
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Old 16-06-19, 07:12 AM
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Originally Posted by WYP View Post
If pricing wasn't an issue HBM2 had a lot of advantages. It is widely considered to use less power than GDDR6, and the latest HBM2 chips from Samsung can run a lot faster than the HBM2 that we have seen on GPUs like the RX Vega 56.

Samsung's latest HBM2 is actually 2x faster than the HBM2 uses on the RX Vega 56 per chip and can come in stacks of up to 16GB per chip.


So basically, an RX Vega 56, if made today with the best HBM2 memory, could offer 820GB/s of bandwidth and 32GB of total memory over two chips. For context, the RTX 2080 Ti offers 616GB/s of memory bandwidth.

Other advantages of HBM2 include the lower PCB area that's required for the chips and the lower memory latencies offered by HBM, due to their more direct connection to the GPU core.

There is a clear reason why many workstation/enterprise-grade graphics cards use HBM2, the problem is that for a consumer product that extra cost and manufacturing complexities aren't worth it.
Basically this. Mark nailed it on the head.
However, taking this question into context it still depends. If GDDR6 is fast enough for the architecture(as in the GPU die) then there are no performance differences. The only benefit is die area really. Depends on the architecture its being used with. Though like Mark said the Enterprise/WS envinroments are willing to pay the extra money for the small benefits so they can cram more GPUs in a single space.
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