Question about GDDR6/HBM3 / 384-bit bus

Discussion in 'General Hardware' started by Gnitix, Jun 27, 2017.

  1. Gnitix

    Gnitix Guest

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    Looking at these 2 articles I have a question about the math itself as to how to fit more memory without widening the bus.

    How would one go about adding 16/20/24 or even 32Gb of VRAM while keeping the bus at 384-bit?
    The best I came up with and looking at GPU's in general was they all come back to 32 bit per chip (e.g 8*1Gb*32-bit = bus width).
    But for the love of god I can't figure out how it actually works, so have a look at GDDR6, it's density and IIRC it's max bandwidth is 64GB/s up from 56Gb/s GDDR5x and 28GB/s GDDR5.

    I can't link the urls it seems, though they are from this site, density is listed as 8Gb-16Gb. If you look up SK Hynix GDDR6 you should find them.
     

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