On: PCI-Sig Releases 256GBps PCIe 6.0 X16 Spec

[Klinky]

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...

> a maximum bidirectional bandwidth of up to 256 GB/s for x16 lanes

[Dylan16807 → Klinky]

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 → Dylan16807]

I am pretty sure that 5.0 128GB/sec figure is also total bidirectional bandwidth with each direction being approximately 64GB/sec

[Dylan16807 → Klinky]

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 → Dylan16807]

I think 128GB/s should be single direction, as 32GB/s was single direction for gen 4.