Asus Crosshair V Formula/ThunderBolt - Manual (Page 112)

3-28 Chapter 3: BIOS setup
NB.LED.Selection.[NB]
Allows you to switch the onboard NB LED display between NB voltage [NB], NB
1.8V [NB 1.8V], and VDDPCIE voltage [VDDPCIE].
Configuration options: [NB] [NB 1.8V] [VDDPCIE]
SB.LED.Selection.[SB]
Allows you to switch the onboard SB LED display between SB voltage [NB] and HT
voltage [HT]. Configuration options: [SB] [HT]
DDR.LED.Selection.[DDR]
Allows you to switch the onboard DDR LED display between DDR voltage [DDR]
and VDDR voltage [VDDR]. Configuration options: [DDR] [VDDR]