Summary: 1.) I purchase this motherboard because I thought my same motherboard had a problem.Found both motherboard respond the same way. Did more search in the web and found out this type chipset use both dual rank and single rank memory. Depending which rank memory I am using, it will give only so much memory capacity. 2.)This motherboard had a defect. Setup system for a nas4free server. It would not see any of the drives that's in a perc5i sata controller. 3.