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007-4498-002
A: Technical Specifications
Dual-inline Memory Modules (DIMMs)
Each SGI Origin 300 base module has from 512 MB to 4 GB of local memory, which
includes main memory and directory memory for cache coherence.
Local memory can consist of two to four banks, which are referred to as banks 0, 1, 2, and
3. The four banks are arranged as two DIMM pairs; DIMM pair 0 and DIMM pair 1.
DIMM pair 0 consists of banks 0 and 1; DIMM pair 1 consists of banks 2 and 3. Each pair
of banks consists of two dual-inline memory modules (DIMMs) that contain double data
rate synchronous dynamic random-access memory (DDR SDRAM) chips.
Memory is increased or decreased in two-DIMM increments only. The two DIMMs that
make up a bank pair must be the same memory size; however, each pair of DIMMs can
be a different memory size. Figure A-7 shows the layout of the memory banks.
Figure A-7
Memory Bank Layout
The SGI Origin 300 base module supports the following memory kits:
•
512-MB kit with integrated directory memory.
•
1-GB kit with integrated directory memory.
•
2-GB kit with integrated directory memory.
VRM 1
VRM 3
VRM 4
Processor
C
Bedrock
Xbridge
Processor
D
Processor
A
Processor
B
VRM 5
VRM 2
DIMM Pair 0, Banks 0, 1
DIMM Pair 1, Banks 2, 3
DIMM Pair 0, Banks 0, 1
DIMM Pair 1, Banks 2, 3
Summary of Contents for Origin 300
Page 1: ...SGI Origin 300 System with NUMAlink Module User s Guide 007 4498 002 ...
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Page 39: ...Base System Components 007 4498 002 13 Figure 1 10 L2 Controller ...
Page 49: ...Optional System Components 007 4498 002 23 Figure 1 17 SGI TP9400 Storage System ...
Page 54: ...28 007 4498 002 1 Introduction Figure 1 18 Tape Drive Libraries L20 L40 L80 L180 L700 ...
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