We used the same processors (Dual Xeon X5355) and memory on the X7DWA-N and X7DAE main boards, but processor performance is lower on the X7DWA-N platform when we test using Everest benchmark and Sandra benchmark. What could be the issue?
Please set "SNOOP FILTER" option to disable in the BIOS.
[Advanced] -> [Advanced Chipset Control] -> [Snoop Filter] => Disable
Changing SNOOP FILTER to disabled will improve performance at least 50%.