Dimms slots motherboards

Solution
That system is designed to use RDIMM ECC "registered" RAM. Do you have 1 CPU or a 2nd one on a riser card? The memory controller is on the CPU, and that chipset only supports 5500, and 5600 series Xeons. If you have a 3500,3600 it won't work.
That system is designed to use RDIMM ECC "registered" RAM. Do you have 1 CPU or a 2nd one on a riser card? The memory controller is on the CPU, and that chipset only supports 5500, and 5600 series Xeons. If you have a 3500,3600 it won't work.
 
Solution