Acer Altos G320 Altos G320 User's Guide - Page 47

37 Upgrading the system memory This section includes instructions for removing and installing a memory module. Altos G320 has four DDR2-533/667 DIMM slots. Each slot supports 512 MB, 1 GB or 2 GB memory modules. The maximum memory capacity is 8 GB. Memory module installation guidelines • The minimum memory configuration is one DIMM, installed in the DIMM 1A socket (the socket closest to the the CPU sockets). However, for optimum performance and dual-channel interleave operation, a minimum of two identical DIMMs should be installed. DIMMs must be identical (same manufacturer, CAS latency, number of rows, columns and devices, timing parameters, etc.). • DIMMs on channel A (DIMM 1A and 2A) are paired with DIMMs on channel B (DIMM 1B and 2B) to enable 2-way interleaving. When only two DIMMs are being used, the population order must be DIMM 1A and DIMM 1B to ensure dual-channel operating mode. Refer to the suggested DDR population table below. DIMM label DIMM 1A DIMM 2A DIMM 1B DIMM 2B Channel A A B B Bank 1 1 2 2 Population order 1 3 2 4 Note: Refer to "Mainboard layout" on page 11 for the location of the DIMM sockets for each processor. Warning! For best performance and dual-channel interleave operation, DIMM modules must be installed or removed in matched pairs, following the socket sequence: DIMM 1A and 1B first, then DIMM 2A and 2B. DIMM modules of the same type, banking, stacking technology, and manufacturer must be installed in the Altos G320 system.