Compaq ProLiant 6400R Compaq ProLiant 6400R Servers - Page 49

2-32 Compaq ProLiant 6400R Maintenance and Service Guide Total Memory 256 MB 512 MB 768 MB 1.024 GB 1.024 GB 1.536 GB 2.048 GB 3.072 GB 4.096 GB Table 2-5 Examples of Memory Upgrade Combinations Bank 1 4x64 MB 4x64 MB 4x64 MB 4x64 MB 4x256 MB 4x128 MB 4x128 MB 4x256 MB 4x256 MB Bank 2 4x64 MB 4x64 MB 4x64 MB 4x128 MB 4x128 MB 4x256 MB 4x256 MB Bank 3 4x64 MB 4x64 MB 4x128 MB 4x128 MB 4x256 MB 4x256 MB Bank 4 4x64 MB 4x128 MB 4x256 MB Address Bit Permuting ProLiant 6400R servers offer enhanced memory performance depending on memory configurations. NOTE: All banks must contain four ECC, EDO DIMMs of the same size, speed, and manufacturer. 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 are memory configuration rules that permit ABP, 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 four 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.