Thread

1. fooker · 1789929721 · focus · HN ↗

   What's the main blocker (other than the current inflated cost) for using HBM instead of DRAM as the primary memory for consumer electronics?

   1. HarHarVeryFunny · 1789935593 · focus · HN ↗

      Why would you want/need to?

      The advantage of HBM over regular non-stacked DRAM is memory bandwidth, which also requires a super-wide memory bus - 2048 bits wide for HBM4. Compare that to the 128 bit wide bus of a modern CPU.

      So to take advantage of it on the desktop, or anywhere else, you need that 2048 bit wide bus, and a processor capable of consuming 2-3 TB of data per second!

      These are not normal requirements, other than for a GPU.

      1. Dylan16807 · 1789952169 · focus · HN ↗

         > Compare that to the 128 bit wide bus of a modern CPU.

         Or 256-512 bits on medium to high end consumer CPUs if you're apple.

         At least DDR6 is probably widening things 50%.

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