Dell server memory configuration on R410

J.R. Sitman
J.R. Sitman used Ask the Experts™
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I have an R410 that had all 8 memory slots with 2 gig dimms.  I replaced A1 & A2, B1 & B2 with 4 gig dimms.  When it booted, it displayed this wasn't the proper memory configuration.

Can someone please tell me exactly which dimms go in what slots?

Thanks
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PowerEdgeTechIT Consultant
Top Expert 2010

Commented:
Top Expert 2014
Commented:
The larger DIMMs should go in the two sockets furthest from the CPU and the smaller ones in the two sockets nearest the CPU (one black and one white clips). That would put 4GB on each channel so be optimal, That means A1 and A4 should have the 2GB ones (A1 and A4 are on the same memory channel).
Ditto for B side.
Top Expert 2014

Commented:
D'oh, PET beat me :)
Took ages to get to page 170 in the manual.
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J.R. SitmanIT Director

Author

Commented:
I did as you instructed.  At boot up it displays unsupported memory configuration.  Dimms A1, A2 & A3 and B1, B2 & B3 should match
J.R. SitmanIT Director
Commented:
I moved the 2 gig to slots 1,2,3 and the 4 gig to 4.  I booted without error.
Top Expert 2014

Commented:
Go into BIOS and change the memory setting to optimizer mode.
J.R. SitmanIT Director

Author

Commented:
It's currently in Optimizer mode and won't let me change it.
Top Expert 2014

Commented:
Probably old BIOS, Dell had some crazy limitations on memory configuration on some of their servers, I don't think they read the Intel manual properly. Either that or you're trying to mix UDIMMs and RDIMMs and it's disabled some slots to make it work.
J.R. SitmanIT Director

Author

Commented:
No problem.  I've got new memory on order, so I'll leave it as is for now.  Thanks

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