Is a MCB193A-FCAT (Single FDR 56Gb/s, 3.0 x16) able to work up to 40-56 Gb/s inside a PCIe 2.0 x8 ? Is a MCB193A-FCAT (Single FDR 56Gb/s, 3.0 x16) able to negotiate to 40GB/s as to work with IS5023 ?

I am new to infiniband and recently such wonderful devices came into my possession, refurbished, IS5023 switches and MCB193A adapters. I am trying to find out if they are compatible with eachother (the 56GBe adapters being able to negotiate to 40GBe to match the IS5023 switches and if the adapter being PCIe 3.0 x16, if they are able to work up to 40GBe (to match the IS5023 switch) into PCIe 2.0 x8 (our risers only use 2.0 x8 PCIe). Thank you and all the best!

Hello Ionut,

Hello ,

Thank you for posting your inquiry on the NVIDIA Networking Community.

Based on the provided information, yes you will be able to use the Connect-IB adapter in a PCI 2.0 slot, as it is backwards compatible. See following PB → The Connect-IB adapter will auto-negotiate at 40Gb/s

Thank you and regards,

~NVIDIA Networking Technical Support