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Tom’s Hardware
Tom’s Hardware
Technology
Anton Shilov

Preliminary HBM4 specs point to major performance uplift for GPUs — transfer speeds up to 6.4 GT/s across a 2048-bit interface

JEDEC Memory TSMC
AMD.

On Friday, the JEDEC Association published preliminary specifications for the 4th Generation high-bandwidth memory (HBM4) as it is getting closer to completing the HBM4 DRAM standard. As reported, the new spec supports a 2048-bit interface per stack amid a lower data transfer rate than HBM3E. In addition, HBM4 supports a broader range of memory layers to make the new memory better address different types of applications.

The new HBM4 standard will specify 24 Gb and 32 Gb layers and offer configurations for 4-high, 8-high, 12-high, and 16-high TSV stacks. The committee has initially agreed on speed bins up to 6.4 GT/s, with ongoing discussions about achieving an even higher data transfer rate.

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