Asus P9X79 PRO - Manual (Page 42)

2-22 Chapter 2: Hardware information
Chapter 2
5. Q-Code LEDs
The Q-Code LED design provides you the 2-digit display, allowing you to know the
system status. Refer to the Q-Code table below for details.
Q-Code table
Code Description
00 Not used
01 Power on. Reset type detection (soft/hard).
02 AP initialization before microcode loading
03 System Agent initialization before microcode loading
04 PCH initialization before microcode loading
06 Microcode loading
07 AP initialization after microcode loading
08 System Agent initialization after microcode loading
09 PCH initialization after microcode loading
0B Cache initialization
0C – 0D Reserved for future AMI SEC error codes
0E Microcode not found
0F Microcode not loaded
10 PEI Core is started
11 – 14 Pre-memory CPU initialization is started
15 – 18 Pre-memory System Agent initialization is started
19 – 1C Pre-memory PCH initialization is started
2B – 2F Memory initialization
30 Reserved for ASL (see ASL Status Codes section below)