Hi, I'm trying to upgrade the memory on our PowerEdge R710

We currently have 6x4GB dual ranked DIMM modules, and have purchased an additional two 4GB modules from cruicial (via their memory checking tool).

I'm having trouble with the new configuration, the initial config was (dual CPU) - D = Dell memory, C = cruical memory, 0 = unpopulated:

D00 D00 D00 CPU1 CPU2 00D 00D 00D

with adding the new memory in the recommended config:

CD0 CD0 000 CPU1 CPU2 000 0DD 0DD

So the memory matches, but the supplier doesn't.  The BIOS complains in this configuration with 'Unsupported configuration, DIMM configuration on each CPU should match' and an F1/F2 is required to continue. 

The server boots up (WinSvr08) fine, O/S recognises the memory and OpenManage reports that the memory is configuration is good.  However, we have had occasions of the server restarting itself since installing the memory.

To get around the problem, does the memory need to match exactly per channel, so I need to purchase 2 additional strips in this config:

CC0 DD0 D00 CPU1 CPU2 00D 0DD 0CC

The memory is in optimized mode, would ECC work with these 6 strips?

Thanks, Adam