Fan Leds; Pcie X16 Slot Leds - MSI X299 TOMAHAWK AC Quick Start Manual

Fan LEDs

These LEDs indicate the fan control mode.

PCIe x16 slot LEDs

These LED indicate the PCIe x16 slots status.
PUMP_FAN1 LED
CPU_FAN1 LED
PCI_E1 LED
PCI_E3 LED
PCI_E4 LED
PCI_E6 LED
LED Color Fan control mode
Red PWM mode
Green DC mode
LED Color PCIe slot speed status
Red x16
White x8, x4, x1
35
Onboard LEDs