Try using the not yet IBM support Emulex drivers for the 10G Ethernet NICs:
http://www.emulex.com/downloads/emulex/drivers/windows/windows-server-2012-r2/drivers/
Try using the not yet IBM support Emulex drivers for the 10G Ethernet NICs:
http://www.emulex.com/downloads/emulex/drivers/windows/windows-server-2012-r2/drivers/