7 ms·

Bandwidth/GPU real estate in terms of area. Biggest GDDR7 chips are 3GB 32-bit, it has 512bit wide bus. And even this is going to moonlight as a space heater

• codedokode 2y ago
  Why Apple packs something like 64 Gb on the CPU chip and NVIDIA cannot?
  • bryanlarsen 2y ago
    Apple uses LPDDR4 which comes in densities of up to 16Gb AFAICT. So they can have ~5X as much memory using the same bus width.
    • nhubbard 2y ago
      Apple uses LPDDR5X, not LPDDR4, iirc
      • xxs 2y ago
        Of course it's ddr5 not 4.
        • IndrekR 2y ago
          From PCB perspective, LPDDR5(X) interface is quite different from regular DDR5. Same with DDR4 and LPDDR4. Source: have designed few boards with different memory interfaces.
  • wmf 2y ago
    LPDDR dies can stack but GDDR cannot?