Asus P6X58-E PRO - Manual (Page 46)

2-26 Chapter 2: Hardware information
Chapter 2
2. TPU LED
The TPU LED lights when the TPU switch is turned to Enable.
2.8 Onboard LEDs
1. DRAM LED
The POST State LED of DRAM indicates the DRAM status during POST (Power-on
Self Test). If an error is found , the LED will continue lighting until the problem is solved.
This user-friendly design provides an intuitional way to locate the root problem within a
second.