Specifications

Functional Architecture Intel® Server Board S3420GPRX TPS

Revision 1.1

Intel order number E92065-001

3.2 Memory Subsystem

The Intel

Xeon

3400 series processor has an Integrated Memory Controller (IMC) in its

package. Each Intel

Xeon

3400 series processor produces up to two DDR3 channels of

memory. Each DDR3 channel in the IMC supports up to three DDR3 RDIMM slots or up to two

UDIMM slots. The DDR3 RDIMM frequency can be 800/1066/1333 MHz DDR3 UDIMM

frequency can be 1066/1333 MHz. All RDIMMs and UDIMMs include ECC (Error Correction

Code) operation. Various speeds and memory technologies are supported.

RAS (Reliability, Availability, and Serviceability) is not supported on the Intel

Server Board

S3420GPRX.

Note: Intel

processor only supports UDIMM.

3.2.1 Memory Sizing and Configuration

The Intel

Server Board S3420GPRX supports various memory module sizes and

configurations. These combinations of sizes and configurations are valid only for DDR3 DIMMs

approved by Intel Corporation.

S3420GPRX BIOS supports:

z DIMM sizes of 1 GB, 2 GB, 4 GB, and 8 GB.

z DIMMs composed of DRAM using 2 Gb technology.

z DRAMs organized as single rank, dual rank, or quad rank DIMMS.

z DIMM speeds of 800, 1066, or 1333 MT/s.

z 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.

S3420GPRX BIOS has the below 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 speed 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..

z 0xE8 - No Usable Memory Error: If no memory is available, the system emits POST

Diagnostic LED code 0xE8 and halts the system.