While HBM1/2 has been of significant interest in recent years for its capabilities in GPUs, GDDR-based memory is hardly going away and the GDDR6 standard is coming and making strides of its own. Samsung, in its press release for its 36 CES 2018 Innovation Award winners, reveals it has GDDR6 memory capable of 16 Gbps with 64 GB/s I/O bandwidth. In the short blurb about the memory, which is a fair distance down the page (it starts "Samsung 16 Gb GDDR6 Memory" if you just want to search on the page), the company points out this is enough to transfer 12 DVDs per second. However, the detail that is equally important is the memory operates at 1.35 V. For comparison, GDDR5 typically takes 1.5 V for 8 Gbps, according to the same blurb.
It is hard to say when exactly we might see GDDR6 in consumer products, or what those products might be. AMD launched its Vega GPUs in recent months and they all use HBM2 while NVIDIA is using GDDR5 and GDDR5X across its consumer product stack. The current Vega GPUs are targeting the higher end though, so perhaps we will see GDDR6 used in future AMD mid-range GPUs. Only time will tell.
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