Comment by 0x457

> 10GbE will require 4x3.0 lanes

3.0 PCIE is irrelevant today when it comes to devices you want on 10G. I'm pretty sure the real reason is that 2.5G can comfortably run on cable you used for 1G[1], while 10G get silly hot or requires transceiver and user understanding of a hundred 2-3 letter acronyms.

Combine it with IPS speeds lagging behind. 2.5G while feels odd to some, makes total sense on consumer market.

[1]: at short distances, I had replaced one run with shielded cable to get 2.5G, but it had POE, so it might contribute to noise?)