Hi,

I am currently facing a kind of weird issue with a R710. 

• It's currently configured with two CPU (CPU1 / CPU2) - E5540 
• 144GB ram in 8GB sticks PCL3 10600R / https://www.serversupply.com/MEMORY/PC3-10600/8GB/MICRON/MT36JSZF1G72PZ-1G4D1DD.htm
• BIOS updated.

When booting, the entire B DIMM Banks are disabled. Not just a few slots but the entire DIMMS.

I have a spare R710 with a different CPU type - E5620 and 144GB of RAM. This one is able to boot without any issues and show both CPU and all the RAM.

I've swapped the two CPU and all of the RAM sticks without any change. All of the B side DIMMS are still disabled. Just for kicks, I swapped both CPU sockets but no change, B DIMMS are still all disabled. Using one or 9 memory sticks in B demonstrates the same behavior. The DIMMS that are supposed to be active are disabled.

It is possible that the B memory channel of the board itself is bad?

Thanks!