If you have dual processors, the user manual states: Two DIMMs(sticks), use slots 1 and 2; Three DIMMs, use slots 1,2 & 3; Four DIMMs, use slots 1,2 and 5,6; Six DIMMs, use slots 1,2,3 and 5,6,7; Eight DIMMs, use slots 1,2,3,4 and 5,6,7,8. BMD recommends 6, 12 or 24 GB for memory optimization (not 8, 16 or 32 GB).
Omar Godinez
Dallas, Tx.