Specifications

Intel® Server Board S3420GPRX TPS Functional Architecture

Revision 1.1

Intel order number E92065-001

Channel A Channel B

X X

X X X X X

X X X X X X

X X

UDIMM

X X

This table defines half of the valid memory configurations. The user can exchange Channel A

DIMMs with the DIMMs on Channel B to get another half.

3.2.7.2 UDIMM Configuration rules

Table 5. UDIMM Memory Configuration Rule

DIMM slots per

channel

DIMMs populated per

channel

Speed Ranks per channel

2 1 1066, 1333 Single Rank, Dual Rank

2 2 1066, 1333 Single Rank, Dual Rank

To get the maximum memory size on UDIMM, the user can get the detailed information from the

following table:

Table 6. UDIMM Maximum Configuration

Max Memory Possible 1Gb DRAM Technology 2Gb DRAM Technology

Single Rank UDIMM 4GB

(4x 1GB DIMMs)

8GB

(4x 2GB DIMMs)

Dual Rank UDIMMs 8GB

(4x 2GB DIMMs)

16GB

(4x 4GB DIMMs)

Intel

Server Board S3420GPRX has below limitations on UDIMM.

 Not support 800MHz ECC UDIMMs

 No support for LV DIMMs

 256Mb technology, x4 DRAM on UDIMM and quad rank UDIMM are NOT supported

 x16 DRAM is not supported on combo routing

 All channels in a system will run at the fastest common frequency

 No mixing of registered and unbuffered DIMMs