Dale: ... > First, I thought cards were backward compatible? You could stick a 3.0 > into a 2.0 slot and it would just run as a 2.0 and vice versa. I know > the mobo is 2.0. It does recognize the drive but seems to nuke the > ethernet somehow. I looked, there is no switches on the card. I don't > see a way to adjust how it works or anything. ...
From first section of https://en.wikipedia.org/wiki/PCI_Express#PCI_Express_3.0 PCI Express 3.0 Base specification revision 3.0 was made available in November 2010, after multiple delays. In August 2007, PCI-SIG announced that PCI Express 3.0 would carry a bit rate of 8 gigatransfers per second (GT/s), and that it would be backward compatible with existing PCI Express implementations. Though in https://en.wikipedia.org/wiki/PCI_Express#Comparison_table they are said to have different encodings. Unfortunately the specs (https://pcisig.com/specifications) are only available for members. Regards, /Karl Hammar
