Specifications

Intel® Server Board S3420GPRX TPS Functional Architecture
Revision 1.1
Intel order number E92065-001
17
z 0xE8 - Configuration Error: If a DDR3 DIMM has no SPD information, the BIOS treats
the DIMM slot as if no DDR3 DIMM is present on it. Therefore, if this is the only DDR3
DIMM installed in the system, the BIOS halts with POST Diagnostic LED code 0xE8 (no
usable memory) and halts the system.
z 0xEB - Memory Test Error: If a DDR3 DIMM or a set of DDR3 DIMMs on the same
memory channel (row) fails HW Memory BIST but usable memory remains available,
the BIOS emits a beep code and displays POST Diagnostic LED code 0xEB
momentarily during the beeping and then continues POST. If all of the memory fails HW
Memory BIST, the system acts as if no memory is available, beeping and halting with
the POST Diagnostic LED code 0xE8 (No Usable Memory) displayed.
z 0xEA - Channel Training Error: If the memory initialization process is unable to
properly perform the DQ/DQS training on a memory channel, the BIOS emits a beep
code and displays POST Diagnostic LED code 0xEA momentarily during the beeping. If
there is usable memory in the system on other channels, POST memory initialization
continues. Otherwise, the system halts with POST Diagnostic LED code 0xEA staying
displayed.
z 0xED - Population Error: If the installed memory contains a mix of RDIMMs and
UDIMMs, the system halts with POST Diagnostic LED code 0xED.
z 0xEE - Mismatch Error: If more than two quad-ranked DIMMs are installed on any
channel in the system, the system halts with POST Diagnostic LED code 0xEE.
3.2.3 Publishing System Memory
The BIOS displays the Total Memory of the system during POST if Quiet Boot is
disabled in the BIOS setup. This is the total size of memory discovered by the BIOS
during POST, and is the sum of the individual sizes of installed DDR3 DIMMs in the
system.
The BIOS displays the Effective Memory of the system in the BIOS Setup. The term
Effective Memory refers to the total size of all active DDR3 DIMMs (not disabled) and not
used as redundant units.
The BIOS provides the total memory of the system in the main page of the BIOS setup.
This total is the same as the amount described by the first bullet in this section.
If Quiet Boot 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 in this section.
The BIOS provides the total amount of memory in the system.
3.2.3.1 Memory Reservation for Memory-mapped Functions
A region of size 40 MB of memory b
elow 4 GB is always reserved for mapping chipset,
processor, and BIOS (flash) spaces as memory-mapped I/O regions. This region appears as a
loss of memory to the operating system. In addition to this loss, the BIOS creates another
reserved region for memory-mapped PCIe functions, including a standard 64 MB or 256 MB of
standard PCI Express* MMIO configuration space.
If PAE is turned on in the operating system, the operating system reclaims all these reserved
regions.