Balancing ram

Discussion in 'Mac Pro' started by Trevornicholls, Jan 9, 2017.

  1. Trevornicholls macrumors newbie

    Joined:
    Jan 9, 2017
    #1
    So today I just picked up a 16g stick of ram for my early 2010 duo quad core Mac Pro. Until now I had 6g of ram, 3 1g cards on each tower, now I only have a single 16g card in slot 1 with 7 free slots. I have been trying to figure out how to configure things to include the 6 1g cards I previously had but can't get the computer to boot with any combination I've tried thus far. Just a blank screen and a blinking power light. I've read very mixed reviews on balancing mixed ram and am a bit lost. Is there a way to configure things to take advantage of the old cards? If I got a second 16g card for the second tower would that allow the system to boot with a 16g1g1g1g on each tower? Thanks
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    My guess would be you bought a RDIMM 16G stick, and the 1G sticks in you machine is UDIMMs. You can't mix them together, this is a guarantee no boot.
     
  3. Trevornicholls thread starter macrumors newbie

    Joined:
    Jan 9, 2017
    #3
    is there any easy way to tell what type it is? It isn't displayed or mentioned anywhere i can find.
     
  4. mattspace macrumors 6502

    mattspace

    Joined:
    Jun 5, 2013
    Location:
    Australia
    #4
    someone correct me if I'm wrong, but I was under the impression when I bought my 3 16g sticks a while back that all 16g ram was of the "doesn't play well with different kids" variety
     
  5. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #5
    The sticker on the RAM stick.

    "U-DIMM" on the sticker.
    IMG_0618.JPG

    "10600R" on the sticker, which means RDIMM.
    IMG_0614.JPG
     

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