Asus RS720-E7/RS12 - Manual (Page 59)

ASUS RS720-E7/RS12; RS720-E7/RS12-E 4-7
6. DDR3 thermal event setting (3-pin DIMMTRIP1)
This jumper allows you to enable/disable DDR3 DIMM thermal sensing event
pin.
7. PMBus 1.2 PSU select jumper (3-pin SMART_PSU1)
This jumper allows you to select PSU PMBus version, Set to pins 1-2 for
PMBus, set to pins 2-3 for Others.
PMBus 1.2
(Default) Others
PMBus 1.2 PSU setting