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ASUS X99-A
1-25
Chapter 1
5. Q-Code LEDs
The Q-Code LED design provides you with a 2-digit error code that displays the system
status. Refer to the Q-Code table on the next page for details.
Q-Code table
(continued on the next page)
Code Description
00
Not used
02
microcode
03
CACHE_ENABLED
04
PCH initialization
06
CPU_EARLY_INIT
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)
31
Memory Installed
32 – 36
CPU post-memory initialization
37 – 3A
Post-Memory System Agent initialization is started
3B – 3E
Post-Memory PCH initialization is started
4F
DXE IPL is started
50 – 53
Memory initialization error. Invalid memory type or incompatible memory
speed
4F
DXE IPL is started
54
Unspecied memory initialization error
55
Memory not installed
56
Invalid CPU type or Speed
57
CPU mismatch
58
CPU self test failed or possible CPU cache error