Intel® Server System M50CYP1UR Family System Integration and Service Guide
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Should a major memory initialization error occur, preventing the system from booting with data integrity, a
beep code is generated, the MRC displays a fatal error code on the diagnostic LEDs, and a system halt
command is executed. Fatal MRC error halts do not change the state of the system status LED and they do
not get logged as SEL events. Table 10 lists all MRC fatal errors that are displayed to the diagnostic LEDs.
Note: Fatal MRC errors display POST error codes that may be the same as BIOS POST progress codes
displayed later in the POST process. The fatal MRC codes can be distinguished from the BIOS POST progress
codes by the accompanying memory failure beep code of three long beeps as identified in Table 10.
Table 10. MRC Fatal Error Codes
No usable memory error
01h = No memory was detected from SPD read, or invalid config that
causes no operable memory.
02h = Memory DIMMs on all channels of all sockets are disabled due to
hardware memtest error.
03h = No memory installed. All channels are disabled.
Memory is locked by Intel® TXT and is inaccessible
DDR4 channel training error
01h = Error on read DQ/DQS (Data/Data Strobe) init
02h = Error on Receive Enable
03h = Error on Write Leveling
04h = Error on write DQ/DQS (Data/Data Strobe
Memory test failure
01h = Software memtest failure.
02h = Hardware memtest failed.
DIMM configuration population error
01h = Different DIMM types (RDIMM, LRDIMM) are detected installed in
the system.
02h = Violation of DIMM population rules.
03h = The 3rd DIMM slot cannot be populated when QR DIMMs are
installed.
04h = UDIMMs are not supported.
05h = Unsupported DIMM Voltage.
Indicates a CLTT table structure error
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