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GDDR6 FAQs

GDDR6(8)
How does graphics DRAM differ from regular DRAM?
Graphics DRAM is a category of DDR SDRAM designed to handle very large bandwidth requirements. Unlike standard DRAM, graphics DRAM is typically soldered down on the same PCB as the SoC and always supports 32 DQs per memory component. Besides graphics cards and game consoles, graphics DRAM is being used in high-bandwidth applications like networking, automotive and high-performance computing.
What features and functions does GDDR6 have compared to previous generations of graphics DRAM?

GDDR6 provides higher densities than previous-generation graphics memory. It doubles the bandwidth (12–16 Gb/s) of GDDR5 while remaining on the traditional discrete package technology (FBGA). GDDR6 has the same low external voltage (1.35V) as GDDR5X but is based on a dual-channel architecture instead of GDDR5X’s single-channel architecture, which enables a huge performance increase while still providing backward compatibility to GDDR5.

GDDR6 extends the lifespan of the graphics card ecosystem in the follow ways:

  • Uses a cost-efficient, mature assembly process on conventional equipment, resulting in high product reliability and fast time to market
  • Uses a similar BOM structure to GDDR5 and GDDR5X
  • Follows successful path of PCB assembly while enabling system data rates up to 1 TB/s
Can GDDR6 operate in GDDR5-like mode?
No
Can GDDR6 operate in GDDR5X-like mode?
Yes
Does GDDR6 support JTAG boundary scan?
Yes, GDDR6 added a connectivity test mode that allows electrical verification of balls after connection to a memory interface.
What is Micron’s competitive position with GDDR6?
Micron is leveraging its GDDR5X-based high-speed signaling know-how from more than two years of design, mass production, test and application learning in Micron GDDR6 products. This allows Micron to remain in the leading position on high-speed signaling with traditional memory components.
Is GDDR6 a JEDEC standard?
Yes, the GDDR6 SGRAM standard was first published in July 2017 as JESD250.
Does GDDR6 replace GDDR5 or GDDR5X?
GDDR6 is not a direct replacement for GDDR5 nor GDDR5X due to package size differences. GDDR5 has a 170-ball, 0.8mm-pitch BGA package, GDDR5X has a 190-ball, 0.65-mm pitch BGA package and GDDR6 has a 180-ball, 0.75mm-pitch BGA package.