In 2016, Micron launched the GDDR5X memory technology, which the name implies is a further development of GDDR5. In the late spring of the same year, Nvidia launched the then new flagship Geforce GTX 1080 with the architecture Pascal, which was the first to use the technology in a finished product.
Despite new advances in high performance High-Bandwidth Memory (HBM) is a basically more expensive technology, which is why GDDR remains an affordable alternative. Initially, the idea was that a regular successor to almost nine years of commercially available GDDR5 would not see the light of day until 2018, but now Micron announces that they intend to get GDDR6 out by the end of 2017.
According to Micron, they are accelerating the rollout of GDDR6 to meet the demand for higher bandwidth in personal computers and game consoles. This could mean that either AMD or Nvidia intends to release new graphics cards with GDDR6 around the turn of the year.
So far, the technical details of GDDR6 are thin. On the other hand, it is known that the memory technology will in the long run be able to offer a transfer speed of 16 Gbps, a doubling against GDDR5 (8 Gbps) and higher than the 12 Gbps that GDDR5X is expected to reach later in the future.
Source: Computerworld