Hello Olivier With that memory there will not be a supported configuration with dual processors. The memory needs to be installed in matched pairs at a minimum, and then the memory needs to be identical in both lanes. That means the minimum supported memory would be 4 matched DIMMs. There is a diagnostic configuration where you install a single DIMM in each lane, but it is only intended for troubleshooting. Thanks
Hello everyone, Lately I decided to upgrade my server's memory to 28GB. I just tried to put it in my server and it gave me a warning that the memory configuration was not supported. I started to search on the internet how to put the memory in and I can't find the answer so I hope you guys can help me out. The memory I have is the following: 3 x 4GB 2R ECC Registered 1066MHz 2 x 8GB 2R ECC Registered 1066MHz  In this server I have installed 2 processors (Intel Xeon E5620) So far I've found out that the memory configuration on both processors has to be identical so I decided to try again with 2 x 4GB and 2 x 8GB and did still not succeed. I've tried multiple configurations but can't find one which works. Does anyone know if it is possible what I'm trying to achieve and if so how to achieve it?  Thanks in advance, Olivier Smet  Sorry if my English is a little poor but I'm from the Netherlands and just 15 years old. 
Dell Poweredge T410 memory upgrade