Results 1 to 8 of 8
  1. #1
    mixing FB RAM with ECC RAM

    Member Since
    Aug 06, 2004
    Location
    Belgium
    Posts
    19
    Specs:
    Mac Pro 2008 8 core -HDD Raid 0 -20Gb/Ram -ATI5870
    mixing FB RAM with ECC RAM
    Hello!
    As stated in the subject, I was wondering if I could use two type pf memory on my mac pro. Currently it's runnig with 8Gb ecc ram and i wish to add 16 Gb ram fully buffered.
    Thx in advance,
    JM

  2. #2
    mixing FB RAM with ECC RAM
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,041
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    ECC only.

    You have not specified which Mac Pro, but taking it as granted it is the one in your avatar, many of us have multiple Macs, here is the ECC memory. Buy only from OWC or Crucial:-


    OWC 8566D3ECC4GB 4GB DDR3 ECC PC8500 1066MHz SDRAM... in stock at OWC
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  3. #3
    mixing FB RAM with ECC RAM

    Member Since
    Aug 06, 2004
    Location
    Belgium
    Posts
    19
    Specs:
    Mac Pro 2008 8 core -HDD Raid 0 -20Gb/Ram -ATI5870
    Hello and the for your quick reply.

    The question was if the Mac pro would be able to run properly when mixing two type of ddr2 ram.
    For now it's running 8 gb of 800 MHz ECC ram. I d'like to add 16 gb of fully buffered ( clockspeed also 800 MHz).
    What remain unclear to me it's the difference between fb and ecc ram.
    Regards,
    JM

  4. #4
    mixing FB RAM with ECC RAM
    Slydude's Avatar
    Member Since
    Nov 15, 2009
    Location
    North Louisiana, USA
    Posts
    8,552
    Specs:
    2.8 GHz MacBook Pro 10.10.2, 8 GB mem, iPhone 6+
    I have not had time to research this much yet but I bet it won't work. I had a 2006 Mac Pro that took the fully buffered ram. When I ordered ram I had to make sure I did not get anything else. I suspect the same is true for ECC ram. I'll do some digging and see what I find out.
    Sylvester Roque Former Contributing Editor About This Particular Macintosh

    "Got Time to breathe. You got time for music." Denver Pyle as Briscoe Darling

  5. #5
    mixing FB RAM with ECC RAM
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,041
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  6. #6
    mixing FB RAM with ECC RAM
    Lifeisabeach's Avatar
    Member Since
    Sep 30, 2007
    Location
    The Republic of Neptune
    Posts
    7,637
    Never never never ever mix types of RAM! You are just begging for trouble. You can even have trouble mixing RAM from different manufacturers, even if specced the same.

  7. #7
    mixing FB RAM with ECC RAM

    Member Since
    Aug 06, 2004
    Location
    Belgium
    Posts
    19
    Specs:
    Mac Pro 2008 8 core -HDD Raid 0 -20Gb/Ram -ATI5870
    Hello all,
    after all the FB Ram I ordered worked very well on my macpro ( it seems they were ecc too). The only diffference is about the CAS latency wich i cannot notice any negativ or positiv impact on the system.

    Regards,
    JM

  8. #8
    mixing FB RAM with ECC RAM
    lclev's Avatar
    Member Since
    Jul 24, 2013
    Location
    Lewisburg, Ohio
    Posts
    1,650
    Specs:
    15" 2011 MBPro,i7,16GB; 13" 2013 MBAir,i5,4GB; MacPro,2:6-coreXeons,32GB,NvidiaGTX780-3GB, iPhone 6+
    Your Mac needs both. Error-correcting code memory (ECC) is a type of computer data storage that can detect and correct the most common kinds of internal data corruption. ECC memory is used to prevent data corruption.

    FB Ram or Fully buffered has an advanced memory buffer (AMB) between the memory controller and the memory module. The memory controller actually writes to the AMB which in turn, acts like a sponge holding data for processing.

    Since a lot of Mac Pro's are used for intensive work like video editing, photo work, etc, the advantage of FB DIMM's that are ECC is nice to have. They will cost more than there unbuffered, non-ecc cousins though.

    And always, always, always match the memory. Never mix it. It might work....doubtful...but I wouldn't be surprised if the machine started acting weird.

    Lisa

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Non ECC RAM for Mac Pro Nehalem?
    By FatherTime in forum Apple Desktops
    Replies: 2
    Last Post: 11-28-2012, 09:56 PM
  2. ecc ram melting
    By infamybrian in forum Apple Desktops
    Replies: 5
    Last Post: 05-27-2010, 07:36 PM
  3. G4 Ram Upgrade, ecc or non-ecc
    By steadadelica in forum Apple Desktops
    Replies: 1
    Last Post: 01-17-2007, 03:29 PM
  4. ECC or Non ECC Ram?
    By randomfactor in forum Apple Desktops
    Replies: 4
    Last Post: 03-04-2006, 05:33 PM
  5. Does ECC Ram work in macs???
    By malice930 in forum Apple Desktops
    Replies: 0
    Last Post: 11-16-2005, 09:04 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •