The driver for your card is : ixgbe
I have no access to a xpenology setup right now but I pretty sure that this module is included but missing dependency.
Install/boot your setup with a classic 10/100/1000 network card, use ssh to load mdio module then ixgbe.
If it's working you have to edit line 310 of /etc/rc and /etc.default/rc to automatically load drivers,
Change : NET_DRIVERS="dca e1000e i2c-algo-bit igb be2net ixgbe tn40xx"
To : NET_DRIVERS="dca e1000e i2c-algo-bit igb be2net mdio ixgbe tn40xx"
Thanks so much Trantor, all good now with 10gb goodness