The PowerEdge SC1425 memory system supports dual channel memory configurations. The memory is organized such that DIMM1_A, DIMM2_A, and DIMM3_A are connected to the lower 64 bits of the memory data bus and the DIMM1_B, DIMM2_B, and DIMM3_B are connected to the upper 64 bits of the data bus. DIMMs must be installed in identical pairs, starting with Bank 1. One bank does not have to be identical to any other bank. Only the 256MB DIMM is supported in a single DIMM configuration, and it must be installed in DIMM1_B socket. This configuration does not support dual way interleaving.