[Pupo]

Čini mi se da ne bude išlo:

X520 Adapters with SFP+ connections support 10GBASE-SR, 10GBASE-LR and SFP+ Copper Direct
Attach physical media.

Data rate supported per port: • Optical: 1 GbE/10 GbE
• Direct Attach: 10 GbE



https://www.intel.com/content/www/us...ers-brief.html

To je server grade oprema, tamo ne poznaju 2.5gbps.


Imaš tu više informacija oko prelaska na 2.5 .