FLYPROFiber 10GBASE-SR SFP+ 850nm 300m DOM Transceiver Module Compatible with Intel E10GSFPSRX

I am using these on Aruba S2500 Switch with Mellanox Connectx-2 on one machine and Mellanox Connectx-3 on another machine. Works flawlessly. As another reviewer mentioned, sometimes I got unexpected disconnections and every time I updated my network settings I lost my IP and had no connection from Finisar transceivers. Now my problem is solved.At this price point, there is no need to buy those cheap Finisar transceivers off eBay. Buy these

These seems to work good, not getting hot like some others I've used. Just be sure to get the right ones for your hardware type.