||DIMMs must be installed in matched pairs. DIMM pairs are populated in the following slot order: A0/B0, C0/D0, A1/B1, C1/D1, etc. DIMM capacities can be different between different DIMM pairs. For example, a valid mixed DIMM configuration may have 1GB DIMMs installed in DIMM Slots A0/B0, and 2GB DIMMs installed in DIMM slots C0/D0. DIMMS should be installed with the largest module pair size first.