Comment on Autopsy of a Freshly Cooked 10Gbit SFP+ Network Adapter by Chris

Please just don't use copper 10G (10GbaseT) modules in any SFP port which doesn't specifically claim compatibility with 10GbaseT. The copper rj45 modules all use a lot more power and generate more heat than fibre or DAC. Regardless of FS compatibility tricks, if it doesn't support any copper modules, then it won't have the power and heat dissipation capacity required.
It's best to buy NICs and switches with integrated copper multi-gig ports.