QuickSpecs
Compaq AlphaServer ES45
DA-10994 World Wide — Version 20 — June 27, 2002 6
Options
Step 2 −
−−
− Additional CPU Modules −
−−
− Optional
• One CPU included, three additional CPUs are supported
SMP upgrade, includes one 68/1000-MHz CPU with 8-MB cache and Tru64 UNIX SMP
license
KN610-DB
SMP upgrade, includes one 68/1000-MHz CPU with 8-MB cache and OpenVMS SMP
license
KN610-DC
Step 3 −
−−
− Memory −
−−
− Optional
• Systems include one memory option
• Maximum four memory options (total of 16 DIMMs) for Model 1B (one per array)
• Maximum eight memory options (total of 32 DIMMs) for Models 2, 2B, and 3B (two per array)
• AlphaServer ES45 system includes two memory buses
• AlphaServer ES45 system includes two arrays per bus
• For Models 2, 2B, and 3B, memory options within an array must be identical
512-MB memory option (4 x 128-MB DIMMs)
MS620-AA
1-GB memory option (4 x 256-MB DIMMs)
MS620-BA
2-GB memory option (4 x 512-MB DIMMs)
MS620-CA
4-GB memory option (4 x 1024-MB DIMMs); order for Model 2 systems only
MS620-DA
4-GB memory option (4 x 1024-MB DIMMs); order for Model 1B, 2B, and 3B systems
only
MS620-DB
Memory performance considerations:
• When two or more memory options are installed, both buses are utilized, enhancing system performance
• Interleaved operations reduce the average latency and increase the memory throughput. When all four arrays are populated
with the same amount of memory, read-write operations are four-way interleaved, enhancing system performance.
The following examples illustrate different ways of configuring a 4-GB system. Case C yields the best performance and is the
recommended method for configuring memory on an AlphaServer ES45 system.
Base System
(one memory option included)
Memory Options
Total Memory Total DIMMs
Performance
Case A
- DA-68DBA-DA
(MS620-DB)
None
4-GB 4
Good
Case B - DA-68DBA-CA
(MS620-CA)
MS620-CA
4-GB 8
Better
Case C - DA-68DBA-BA
(MS620-BA)
MS620-BA + MS620-BA +
MS620-BA
4-GB 16
Best *
NOTE: * = Operating system and application dependent. Up to an 18% performance enhancement has been measured in Case C over Case A.
Step 4 −
−−
− Additional Power Supply − Optional
One Power Supply Standard with Model 1B, 2B, and 3B systems, provides system support for:
• Two CPUs
• One disk drive cage (up to six disk drives)
• Four memory options (up to 16 DIMMs)
Two Power Supplies Standard with Model 2 system, provides system support for:
• Four CPUs
• Two disk drive cages (up to twelve disk drives)
• Eight memory Options (up to 32 DIMMs)
Third Power Supply Optional − Provides (N+1) power redundancy system support for two power
supply configuration
• Additional power supply ordered with a tower system requires an additional country-specific power cord
• Pedestal system and Rack kit include three internal IEC/IEC power cords regardless of the number of power supplies ordered
ES45 720 W power supply; order for Model 2 systems only
H7906-A9
ES45 1080 W power supply; order for Model 1B, 2B, and 3B systems only
3X-H7514-AA
(91 Seiten)
(128 Seiten)
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