Mid 2010 Mac Pro Ram Question

Discussion in 'Mac Pro' started by mrt209, Sep 29, 2014.

  1. mrt209 macrumors 6502

    Joined:
    Nov 21, 2010
    Location:
    USA/Germany
    #1
    Hi,

    I currently have 3*4G 1333MHz DD3 ECC ram in my mac pro. I wanted to purchase 4gb more to fill the last slot and didn't notice the ram I purchased was non-ECC. Is it bad to mix ECC & non-ECC? If yes, were can I find 1333MHz DD3 ECC SDRAM (can't find it anywhere).

    Thanks
     
  2. Ironjer macrumors regular

    Joined:
    Jul 18, 2013
  3. RoastingPig macrumors 68000

    RoastingPig

    Joined:
    Jul 23, 2012
    Location:
    SoCal
    #3
  4. mrt209 thread starter macrumors 6502

    Joined:
    Nov 21, 2010
    Location:
    USA/Germany
    #4
    Thanks for the answers... out of curiosity what happens when you mix them?
     
  5. flowrider macrumors 601

    flowrider

    Joined:
    Nov 23, 2012
    #5
    To the OP, you do realize your CPUs utilize three RAM channels, right? Slots 3 and 4 run in parallel as the third channel. Optimum RAM performance is obtained when utilizing slots 1,2 and 3 with equally speced RAM and leaving slot 4 MT.

    Lou
     
  6. mrt209 thread starter macrumors 6502

    Joined:
    Nov 21, 2010
    Location:
    USA/Germany
    #6
    Sorta that's why I initially purchased 12gb of ram, but I was under the impression it was because at the time the extra cost of filling the fourth slot wasn't worth it in terms of performance. With prices down these days I thought it may be worth it.
     
  7. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #7
    You can mix them. I'd try that few times already. However, that will make you lost the ECC function.
     
  8. mrt209 thread starter macrumors 6502

    Joined:
    Nov 21, 2010
    Location:
    USA/Germany
    #8
    Thanks everyone for the input, took out the non-ECC memory. Ran a check on the other three and they still work fine... as you can tell I know very little to nothing about comp hardware.
     

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