3 ms·

Maybe they are considering both directions, i.e. 128GB/sec full duplex = 256GB/sec total bandwidth. Kinda cheeky. https://pcisig.com/blog/pcie%C2%AE-60-specifi

by Klinky 5y ago

Maybe they are considering both directions, i.e. 128GB/sec full duplex = 256GB/sec total bandwidth. Kinda cheeky. https://pcisig.com/blog/pcie%C2%AE-60-specification-released-members-double-bandwidth-next-generation-applications https://pcisig.com/blog/pcie%C2%AE-60-specification-released... > a maximum bidirectional bandwidth of up to 256 GB/s for x16 lanes

Dylan16807 5y ago
They're definitely considering both directions for the total bandwidth number. But I don't think that's what's happening with the gigatransfers. When they launched 5.0, they were clearly counting one differential pair of pins: "Delivers 32 GT/s raw bit rate and up to 128 GB/s via x16 configuration"
- Klinky 5y ago
  I am pretty sure that 5.0 128GB/sec figure is also total bidirectional bandwidth with each direction being approximately 64GB/sec
  - Dylan16807 5y ago
    Yes, it is. But my point is, even though they were already doing that, they were claiming 32GT/s last generation. But it's 64GT/s now. I don't think that's counting more pins, I think they're saying that each transfer is two transfers.
    - shaklee3 5y ago
      I think 128GB/s should be single direction, as 32GB/s was single direction for gen 4.
    - deleted 5y ago
      [deleted]