JEDEC finalizes HBM4 memory standard with major bandwidth and efficiency upgrades

Tom's Hardware
Apr 17, 2025, 7:23 am328 ptsTop
HBM4 offers faster data rates, more channels, and higher memory capacities, with features like Directed Refresh and flexible voltage options to boost performance and reliability.

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Industry preps 'cheap' HBM4 memory spec with narrow interface, but it isn't a GDDR killer — JEDEC's new SPHBM4 spec weds HBM4 performance and lower costs to enable higher capacity

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