PCI Express 5.0 Announced with 32GT/S Transfer Rates

[rbanffy]

https://www.phoronix.com/scan.php?page=news_item&px=PCIe-5.0-Announced

[londons_explore]

It's time for standards to stop setting fixed 'speeds'.

Instead, on powerup, devices should communicate at some base speed, then every millisecond go 10% faster. As soon as communication fails, step the speed back 2 steps and use that speed.

That way we wouldn't need a new standard every time someone invents something slightly faster.

[arnon]

Getting close to IBM and NVIDIA's NVLink at 300GB/s!

[j-walker → arnon]

Looks like NVLink is 25GT/s while PCIe 5.0 is 32GT/s (per pair of electrical "wires").

[arnon → j-walker]

On POWER9 NVLink is 300GB/s aggregated in/out.

PCIe 5.0 has a higher transfer rate, but can't aggregate links, so it's limited to 63.01 GB/s (at PCIe 5.0 x16)