Asus Rampage III GENE User Manual page 52

2. QPI_LL (3-pin QPI_LL_SW)
This jumper prevents QPI voltage from dropping too much when you perform
overclocking. The low QPI voltage may cause system malfunction. Set
the jumper to pin 2—3 to activate this function and pin 1—2 to disable this
function.
2-28 Chapter 2: Hardware information