dagwaremedia

Q: Mac Pro early 2008 Quadcore 2.66 ECC error

I see my Mac Pro runs sluggish and I see a lot of beachballs. I also see the following come up in the memory report. Do I replace the stick or get a new pair?

 

Size: 4 GB

  Type: DDR2 FB-DIMMmemory report.png

DIMM Riser A/DIMM 1:

  Size: 4 GB

  Type: DDR2 FB-DIMM

  Speed: 800 MHz

  Status: ECC Errors

  ECC Correctable Error

  Manufacturer: 0x802C

  P

iPhone 6 Plus, iOS 8.3

Posted on Sep 22, 2016 8:17 AM

Close

Q: Mac Pro early 2008 Quadcore 2.66 ECC error

  • All replies
  • Helpful answers

  • by lllaass,

    lllaass lllaass Sep 22, 2016 8:21 AM in response to dagwaremedia
    Level 10 (189,609 points)
    Desktops
    Sep 22, 2016 8:21 AM in response to dagwaremedia

    That typically mean the RAM module is failing. The memory is ECC (error correcting code) and many erros can and are corrected so computer operation is not affected.

    You can try reseating the module but frequently the problem returns.

    The FB-DIMMs in the 2006-2008 Mac Pros run hot and typically fail with time

  • by dagwaremedia,

    dagwaremedia dagwaremedia Sep 22, 2016 8:26 AM in response to lllaass
    Level 1 (4 points)
    Desktops
    Sep 22, 2016 8:26 AM in response to lllaass

    I noticed this a few months back, re seated and it worked for a while. If I re seat and get it to work am I wrong in thinking this would effect the computer performance?

     

    R

  • by lllaass,

    lllaass lllaass Sep 22, 2016 8:29 AM in response to dagwaremedia
    Level 10 (189,609 points)
    Desktops
    Sep 22, 2016 8:29 AM in response to dagwaremedia

    When there are too many errors and they can't be corrected that is when yo have problems. You will frequently get a kernel panic.

    Also when they fail and failure is detected during the normal bootup RAM test, the FB-DIMM pair will be listed as empty

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Sep 22, 2016 8:29 AM in response to dagwaremedia
    Level 9 (61,140 points)
    Desktops
    Sep 22, 2016 8:29 AM in response to dagwaremedia

    If the failing modules have Vendor stickers that indicate they are aftermarket, most have a Lifetime Warranty, and you can return the PAIR to the Vendor for replacement. (their sticker is all the "proof of purchase" you need.)

     

    If only the manufacturer stickers, (such as Hynix or Toshiba) now is a good time for an upgrade. If you can get all slots filled with pairs, the memory in these Macs switches to double-wide accesses for about a 17 percent memory speed improvement.