GDDR5X Memory Standard Introduced; Doubles Speed, Bandwidth than GDDR5
If you think GDDR5 was getting old, JEDEC Solid State Technology Association is introducing GDDR5X that boasts of twice as much as bandwidth and memory speed as the former.
The GDDR5X has been derived from GDDR5 SGRAM JEDEC standard and is optimized for applications requiring very high memory bandwidth. JEDEC says that “with the intent to address the needs of high-performance applications demanding ever higher data rates, GDDR5X is targeting data rates of 10 to 14 Gb/s, a 2X increase over GDDR5.”
Moreover, it used the same pseudo open drain (POD) signaling that is used in GDDR5 as well with the intention of providing a smooth transition between the two.
Mian Quddus, the chairman of JEDEC Board of Directors boasts that the new memory standard is going to usher a host of performance improvements to the next generation of graphics:
GDDR5X represents a significant leap forward for high end GPU design. Its performance improvements over the prior standard will help enable the next generation of graphics and other high-performance applications.
It has also been revealed that the newer memory standard is going to boast 16n data words per memory access as compared to 8n that GDDR5 offered. Their initial targets are 10 – 12 Gbps with a potential of reaching 16 Gbps.
We have already known that the command protocols and ecosystem is also going to stay the same as GDDR5 as much as possible with a few changes being made to the command protocols. Here’s a graphical representation of the improvements as compared to DDR3, DDR4, LPDDR4 and GDDR5.