HP LH4r HP Netserver LXr 8000 Memory Upgrade Guide - Page 18

Observe these guidelines when adding memory: • Add (or remove) DIMMs to the memory board in groups of four. Each group of four DIMMs must fill one bank on a memory board. A bank must be either fully populated or completely empty. See Figure 2-3. • When populating a memory board, fill Bank A first, then Bank B, then Bank C, and finally Bank D. You must do this if a board is to have four-way interleaving. • All DIMMs within a bank must be identical in size and speed. A bank must contain either all 64 MB DIMMs or all 256 MB DIMMs. • Banks of 64 MB DIMMs and 256 MB DIMMs can coexist on the same memory board. • The minimum memory configuration is four 64 MB DIMMs in one bank on the primary (right-hand) memory board, and no DIMMs on the left-hand board. When the system has two memory boards but only four DIMMs, all four DIMMs must be on the primary memory board. (The left-hand, secondary board must always be in the system, even if it does not hold a DIMMs.) • For board-to-board interleaving, each memory board must hold the same number of DIMMs. If one board holds two types of DIMMs, the other board must also, and in the same banks. (For 12