mellanox connectx cable

Hello, At this moment I use 2x HP servers, DL360p G8 and DL380 G9, both with HP 649283-B21 40G NICs... They work fine as ethernet adapters on pfSense without flashing etc... But now I need some decent PCI-e x16 100G NICs for another servers which ill use at 40G (no 100G switch) but I hope to...

Hi all, I have bought two dual port mellanox nics, as in the following link: Mellanox MCX4121A-XCAT ConnectX-4 Lx EN Network Interface Card 10GbE Dual-Port SFP28 PCIe3.0 x8 ROHS R6 Each of these nics is installed on a different host. I want to buy a DAC cable of 2 meter length, for...