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Intel® 5000 Series Chipsets Server Board Family Datasheet
3.3.2
POST Error Codes
The range {0xE0, 0xEF} of POST codes is used for memory errors in early POST. In late POST,
this range is used for reporting other system errors.
If no memory is available, the system will emit POST Diagnostic LED code 0xE1 and
halt the system.
If the system is unable to communicate with the FBDIMMs, the BIOS will eventually time
out and report POST Diagnostic LED code 0xE4. This is usually indicative of hardware
failure.
If a FBDIMM or a set of FBDIMMs on the same FBD memory channel (row) fails Memory
®
Intel
Interconnect built in self test (Intel
emit POST Diagnostic LED code 0xE6. If all of the memory fails IBIST the system will
act as if no memory is available.
Any of the above errors cause a memory error beep code. Memory beep code errors are
described in Section 5.3.2, POST Code Checkpoints.
3.3.3
Publishing System Memory
The BIOS displays the total memory of the system during POST if the display logo is
disabled in the BIOS Setup utility. Total memory is the total size of memory discovered
by the BIOS during POST, and is the sum of the individual sizes of installed FBDIMMs.
The total memory is also displayed on the main page of the BIOS Setup utility.
The BIOS displays the effective memory of the system in the BIOS Setup utility.
Effective memory is the total size of all FBDIMMs that are active (not disabled) and not
used as redundant units.
If the Display Logo is disabled, the BIOS displays the total system memory on the
diagnostic screen at the end of POST. This total is the same as the amount described by
the first bullet, above.
The BIOS provides the total amount of memory in the system by supporting the EFI Boot
Service function GetMemoryMap().
The BIOS provides the total amount of memory in the system by supporting the INT 15h,
E820h function. See the Advanced Configuration and Power Interface Specification,
Revision 2.0 for details.
Note: Memory between 4 GB and 4 GB minus 1.5 GB is not accessible for use by the operating
system and may be lost to the user. This area is reserved for BIOS, APIC configuration space,
and virtual video memory space. See section 3.3.3.1. Memory will also be reserved for PCI /
PCI Express* / PCI Express resources. This means that if 4 GB of memory is installed, 2.5 GB
or less of this memory is usable. The chipset allows remapping unused memory above the 4 GB
address. To take advantage of this, turn on Physical Address Extensions (PAE) in your
operating system.
Revision 1.1
®
IBIST), or Memory Link Training, the BIOS will
Intel order number D38960-004
System BIOS
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