QG82945GSE S LB2R Intel, QG82945GSE S LB2R Datasheet - Page 342

• Manufacturer Part Number: QG82945GSE S LB2R
• Description: GRAPHICS AND MEM CNTRL HUB; No. of Pins: 998; Package / Case: FCBGA; Interface Type: PCI, SATA, USB
• Manufacturer: Intel

10.2.4
10.2.4.1
342
DRAM Technologies and Organization
All standard 256-Mb, 512-Mb, and 1-Gb technologies and addressing are supported for
x16 and x8 devices.
The (G)MCH supports various page sizes. Page size is individually selected for every
rank; 4 k and 8 k for Asymmetric, Symmetric, or Single-channel modes.
The DRAM sub-system supports single or dual-channels, 64-bit wide per channel.
The maximum number of ranks for dual-channel and single-channel configurations are
described below:
Mixed mode double-sided SO-DIMMs (x8 and x16 on the same SO-DIMM) are not
supported.
By using 1-Gb technology, the largest memory capacity is 4 GB (128M x 8b x 8 devices
x 4 ranks = 4 GB). This is achieved using stacked SO-DIMMs. With non-stacked SO-
DIMMs, the maximum memory capacity is 2 GB (64M x 16b x 4 devices x 4 ranks = 2
GB).
By using 256-Mb technology, the smallest memory capacity is 128 MB (16M x 16b x 4
devices x 1 ranks = 128 MB).
Rules for Populating SO-DIMM Slots
In all modes, the frequency of System Memory will be the lowest frequency of all SO-
DIMMs in the system, as determined through the SPD registers on the SO-DIMMs. In
both single-channel and dual-channel configurations, the Mobile Intel 945GM/GME/PM/
GMS/GSE, 943/940GML and Intel 945GT Express Chipsets support only one SO-DIMM
connector per channel.
• If configured as a dual-channel system, each channel can have one or two ranks
• If configured as a single-channel system, that channel can have one, two or three
• In the Single-channel mode, only channel A (channel 0) may be used.
• In Dual-channel Symmetric mode, both SO-DIMM slots must be populated, but the
• In Dual-channel Asymmetric mode, the total memory in the two channels need not
populated
ranks populated.
total amount of memory in each channel must be the same. The device
technologies may differ.
be equal (one slot could even be unpopulated).
Functional Description
Datasheet