Compaq ProLiant 6400R Compaq ProLiant 6400R Setup and Installation Guide - Page 68

Address Bit Permuting

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Installing Hardware Options 3-15 10. Power on the server. See Chapter 2, "Powering Up the Server." Address Bit Permuting The ProLiant 6400R server offers enhanced memory performance memory configurations. By following memory configuration rules, the system memory access time is reduced automatically, and system performance is improved. NOTE: All banks must contain four EDO DIMMs of the same size, type, and speed. Address Bit Permuting (ABP) is an option that distributes memory addresses across two or four banks of memory. Therefore, an ABP group may be two or four banks in size. The following section contains memory configuration rules that permit ABP. Memory Configuration Rules for Address Bit Permuting: Two or four banks on a memory expansion board must be populated. All banks within an ABP group (two banks for a two-bank group and four banks for a four-bank group) must be of the same memory capacity. The memory in the expansion board must be populated starting with bank 1 and each populated bank must be adjacent. For example, installing 4 × 256-MB DIMMs in bank 1 would achieve 1 GB of total memory, but would not enable ABP. However, installing 16 × 64-MB DIMMs, using all four banks, would enable ABP and enhance memory performance.

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Installing Hardware Options
3-15
10.
Power on the server. See Chapter 2,
“
Powering Up the Server.
”
Address Bit Permuting
The ProLiant 6400R server offers enhanced memory performance memory
configurations. By following memory configuration rules, the system memory
access time is reduced automatically, and system performance is improved.
NOTE:
All banks must contain four EDO DIMMs of the same size, type, and speed.
Address Bit Permuting (ABP) is an option that distributes memory addresses
across two or four banks of memory. Therefore, an
ABP group
may be two or
four banks in size. The following section contains memory configuration rules
that permit ABP.
Memory Configuration Rules for Address Bit
Permuting:
■
Two or four banks on a memory expansion board must be populated.
■
All banks within an ABP group (two banks for a two-bank group and
four banks for a four-bank group) must be of the same memory capacity.
■
The memory in the expansion board must be populated starting with
bank 1 and each populated bank must be adjacent.
For example, installing 4
×
256-MB DIMMs in bank 1 would achieve 1 GB of
total memory, but would not enable ABP. However, installing 16
×
64-MB
DIMMs, using all four banks, would enable ABP and enhance memory
performance.