Asus RS926-E7/RS8 - Manual (Page 60)

4-6 Chapter 4: Motherboard information
4. LAN controller setting (3-pin LAN_SW1)
These jumpers allow you to enable or disable the onboard Intel ® i350 Gigabit
LAN controllers. Set to pins 1-2 to activate the Gigabit LAN feature.
5. ME firmware force recovery setting (3-pin ME_RCVR1)
This jumper allows you to force Intel Management Engine (ME) boot from
recovery mode when ME become corrupted.