GDDR7 SDRAM

GDDR7 SDRAM
Graphics Double Data Rate 7 Synchronous Dynamic Random-Access Memory
Type of RAM
Developer	JEDEC
Type	Synchronous dynamic random-access memory
Generation	7th generation
Predecessor	GDDR6 SDRAM

Graphics Double Data Rate 7 Synchronous Dynamic Random-Access Memory (GDDR7 SDRAM) is a type of

graphics cards, game consoles, and high-performance computing. It is a type of GDDR SDRAM (graphics DDR SDRAM), and is the successor to GDDR6

History

At Samsung Tech Day 2022,
GDDR6X, which could deliver up to 36 GT/s.^[1] Samsung later announced two months later that it would use PAM-3 signaling to achieve the highest transfer rate.^[2]

On March 8, 2023, Cadence announced the verification solution tool for preliminary GDDR7 SDRAM production.^[3]
On June 30, 2023, Micron announced that it will be manufactured using 1ß node (equivalent to 12–10 nm process node), slated to release in H1 2024.^[4]
On July 18, 2023, Samsung announced the first generation of GDDR7, which can reach up to 32 Gbps per pin (33% higher bandwidth per pin compared to 24 Gbps per pin on GDDR6), 40% higher bandwidth (1.5 TB/s) compared to GDDR6 (1.1 TB/s) and 20% more energy efficient. For packaging material, it will use
epoxy molding compound (EMC) along with IC architecture optimization, which will reduce thermal resistance by 70%.^[5] Later, on a Q&A session, Samsung mentioned that it will be manufactured using D1z node (equivalent to 15–14 nm^[6]) and will operate on 1.2V. A 1.1V version with reduced clockspeeds will also be made available at some point in to the future after the release of the 1.2V version.^[7]

On March 5, 2024, JEDEC published the GDDR7 Graphics Memory Standard officially and publicly.[8]

GDDR7 SDRAM introduced PAM-3 signaling (3 level

deep ultraviolet (DUV)

lithography tools.

v t e Dynamic random-access memory (DRAM)
Asynchronous	FPM DRAM EDO DRAM
Synchronous	SDRAM DDR SDRAM DDR2 DDR3 DDR4 DDR5 LPDDR (Mobile DDR) Fast Cycle DRAM (FCRAM) eDRAM RLDRAM HBM HBM2 HBM2E HBM3 HBM-PIM HBM3E Hybrid Memory Cube
Graphics	VRAM WRAM MDRAM SGRAM GDDR GDDR2 GDDR3 GDDR4 GDDR5 GDDR6 GDDR7
Rambus	RDRAM XDR DRAM XDR2 DRAM
Memory modules	SIMM DIMM UniDIMM CAMM
Lists	DRAM timeline SDRAM timeline Bandwidth Transistor count