Intel EP80579 Guide

Intel
®
EP80579 Integrated Processor Product Line May 2010
Order Number: 320068-005US 317
System Memory Interface (SODIMM)—Intel
®
EP80579 Integrated Processor Product Line
A.1 Terminology and Definitions
A.2 Supported Configurations
Table A-2 shows the various DDR2 SODIMM memory configurations, including
capacities and technologies, supported by the EP80579.
A.3 Differences between Unbuffered SODIMM and Unbuffered
DIMM
The main difference between Unbuffered SODIMM and Unbuffered DIMMs is that an
unbuffered non-ECC DIMM requires three input clocks, whereas an Unbuffered SODIMM
only requires two input clocks, with no support for ECC. Typical DIMM pins include the
place holder pins for ECC functions.
Table A-1. DDR Terminology
Acronym Description/Comment
Unbuffered memory
Memory that does not contain buffers or registers located on the module. The memory
controller directly communicates with the memory devices.
Buffered memory
Memory that contains buffers on the module that re-drive signals from the memory
controller to the memory devices.
Note: EP80579 does not support this feature.
Registered memory
Memory that contains registers on the module that register and re-drives the signals
from the memory controller to the memory devices.
Self-refresh Memory technology that is built in the DRAM that refreshes on its own.
Page size
Minimum number of column locations on any row and are accessed by a single
ACTIVATE command
DRAM devices Multiple DRAM devices together make up a DIMM
DIMM Dual Inline Memory Module
SODIMM Small Outline Dual Inline Memory Module
Rank
Defines a set of DRAM chips (on a module) comprising 8 byte wide (64/32 bits) data,
or 9 bytes (72/40 bits) with ECC.
All devices in a Rank are connected by a single chip select. The actual memory size is
not defined. Single-sided memory modules are always single-rank. Double-sided
unbuffered and registered DIMMs are always dual-rank.
Table A-2. Supported SODIMM Memory Capacity for 64-bit Mode
Total DRAM
Capacity
Technology
Total # of parts
(without ECC)
DRAM
Density
DRAM Part
Width
256 MB 256 Mb x8 8
512 MB
512 Mb x8 8
1 GB 1 Gb x8 8
2 GB
2 Gb x8 8

Intel EP80579 Specifications

General

Brand	Intel
Model	EP80579
Category	Computer Hardware
Language	English