Intel® Server Board S3420GP TPS Functional
Architecture
Revision 2.4
Intel order number E65697-010
19
S3420GP supports:
DIMM sizes of 1 GB, 2 GB, 4 GB, and 8 GB.
DIMMs composed of DRAM using 2 Gb technology.
DRAMs organized as single rank, dual rank, or quad rank DIMMS.
DIMM speeds of 800, 1066, or 1333 MT/s.
Registered or Unregistered (unbuffered) DIMMs (RDIMMs or UDIMMs).
Note:
UDIMMs should be ECC, and may or may not have thermal sensors; RDIMMs must have
ECC and must have thermal sensors.
S3420GP has the following limitations:
256 Mb technology, x4 DRAM on UDIMM, and quad rank UDIMM are NOT supported
x16 DRAM on UDIMM is not supported on combo routing
Memory suppliers not productizing native 800 ECC UDIMMs
Intel
®
Xeon
®
3400 Series support all timings defined by JEDEC.
256 Mb/512 Mb technology, x4 and x16 DRAMs on RDIMM are NOT supported
All channels in a system will run at the fastest common frequency
No mixing of registered and unbuffered DIMMs
No mixing of different ranks or speeds on UDIMM or RDIMM.
3.2.2
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.
0xE8 - No Usable Memory Error
: If no memory is available, the system emits POST
Diagnostic LED code 0xE8 and halts the system.
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.
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.
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.
0xED - Population Error
: If the installed memory contains a mix of RDIMMs and
UDIMMs, the system halts with POST Diagnostic LED code 0xED.
