JEDEC Unveils GDDR7 As The Next-Gen Graphics Memory Standard, AMD & NVIDIA Onboard

05.03.2024 - 15:45 / wccftech.com / Hassan Mujtaba

JEDEC has officially announced GDDR7 as the next-gen graphics memory standard, having both AMD & NVIDIA onboard.

GDDR7 Has Gone Official: AMD & NVIDIA Both Onboard The Bandwagon As JEDEC Unveils New Memory Standard

As of right now, both Samsung & Micron have laid out their plans for the development of next-gen GDDR7 memory modules. Samsung is aiming for 32 Gbps speeds while Micron is aiming for 24 Gb+ 32 Gbps dies too. Micron, in its latest roadmap, also unveiled up to 36 Gbps & 24Gb+ memory dies by 2026.

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Press Release: JEDEC the global leader in the development of standards for the microelectronics industry, is pleased to announce the publication of JESD239 Graphics Double Data Rate (GDDR7) SGRAM. This groundbreaking new memory standard is available for free download from the JEDEC website. JESD239 GDDR7 offers double the bandwidth over GDDR6, reaching up to 192 GB/s per device, and is poised to meet the escalating demand for more memory bandwidth in graphics, gaming, compute, networking, and AI applications.

JESD239 GDDR7 is the first JEDEC standard DRAM to use the Pulse Amplitude Modulation (PAM) interface for high-frequency operations. Its PAM3 interface improves the signal-to-noise ratio (SNR) for high-frequency operation while enhancing energy efficiency. By using 3 levels (+1, 0, -1) to transmit 3 bits over 2-cycles versus the traditional NRZ (non-return-to-zero) interface transmitting 2 bits over 2-cycles, PAM3 offers higher data transmission rate per cycle resulting in improved performance.

Additional advanced features include:

• Core independent LFSR (linear-feedback shift register) training patterns with eye masking and error counters to improve training accuracy while reducing training time.
• Doubles the number of independent channels doubles from 2 in GDDR6 to 4 in GDDR7.
• Support for 16 Gbit to 32 Gbit densities including support for 2-Channel mode to double system capacity.
• Address the market need for RAS (Reliability, Availability, Serviceability) by incorporating the latest data integrity features including on-die ECC (ODECC) with real-time reporting, data poison, Error check and Scrub, and command address parity with command blocking (CAPARBLK).

Industry Support

“The groundbreaking GDDR7 memory standard unveiled today represents a pivotal step towards unlocking the potential of next-generation consumer, gaming, commercial, and enterprise devices,” said Joe Macri, Compute and Graphics CTO and Corporate Fellow at AMD. "By harnessing the transformative power of GDDR7s, we can collectively unlock a new era of transformational compute and graphics possibilities, paving the way for a