I have problem with a new HP ProLiant DL320 G6 server. From the beginning it had to less memory, and now I have ordered more memory two times. Now I am struggling to populate the server with these memories.

I have two memories: HP 4GB 2Rx4 PC3-10600R-9 Kit

How should I populate them on the motherboard?

I have tried to understand the documentations, but it's very unclear for me. I have populated slot 1 and 4, but I can not start the server with that configuration.

  • What kind of memory did it come with? If it came UDIMMS, those RDIMMs will not work as you can't mix-n-match memory.
    – Chris S
    Commented Sep 7, 2010 at 14:26
  • @Chris: How do I see if it is UDIMMs? The memory that came with the server is labeled the same as above but 2GB.
    – Jonas
    Commented Sep 7, 2010 at 14:44
  • PC3-10600R = RDIMM; PC3-10600U = UDIMM. Also, whatever is in slots 1/4/7 or 2/5/8 or 3/6/9 should be the same size (2 or 4GB, etc). So if you have 2GB RDIMMs in there already, they would go in slots 1/4/7; and the new memory would go in 2/5/8. Typically you should always buy in multiples of 3; but it's not necessary. If you buy in multiples of two you should not use slots 7,8 or 9 however.
    – Chris S
    Commented Sep 7, 2010 at 15:25
  • @Chris: Thanks for the information. But it was only one stick of 2GB, and I got additionally 2 sticks with 4GB. For the moment I have removed the 2GB stick and is only using 2x4GB.
    – Jonas
    Commented Sep 7, 2010 at 20:22

2 Answers 2


The memory/DIMM population rules are noted here:


In summary... You have three channels of three slots per CPU. Populate the DIMMS in the order listed in the diagram... e.g. the first slot within each channel.


Have a go with the HP ProLiant DDR3 Memory Configuration Tool which should output a map of what DIMM's are best placed where.

  • Old answer, I know, but still totally valid and saved me a massive headache trying to figure the configuration out for our new Proliant server. Thanks.
    – Kez
    Commented Aug 7, 2012 at 11:15

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