random lockups

Discussion in 'Mac Pro' started by brendon2020, Apr 12, 2009.

  1. brendon2020 macrumors 6502

    Jul 14, 2007
    I've got the original 2.66 dual mac pro and for the longest time the mac would randomly lock. It would be on for a couple of days and just lock, sometimes it would be a few weeks. I checked the console and did not see anything as to why, just that the logs stopped.

    I started by taking out drives (have 3 drives) which did nothing, then i started with the ram. I've got 2gigs of apple ram (4x512s) and 2x2gb of non apple ram. I first removed a gig of the apple ram (2x512) and noticed from multiple weeks it doubled the time i would see lock ups (could be a coincidence). I finally removed the last 2 sticks of apple ram and my machine hasn't locked up since.

    I haven't tried just the apple ram, so i'm wondering if this is a common thing? I've been buying ram from this company (forgot the name) for all of my macs and never had any issues. Is it better to not mix brands when it comes to memory.

    I also have a mac pro at work (2.8, penryn) also with apple ram and the 4gigs of ram from this vendor and no issues what so ever.
  2. brop52 macrumors 68000


    Feb 26, 2007
    The RAM might have something to do with it. A PRAM reset might be in order. Hold command-option-p-r at startup until it chimes twice and let go. As for the correct configurations for Mac Pro RAM I'm going to defer to someone else. I know there is a certain order to it.

    The other thing you can do is run the Apple Hardware test buy holding down d at startup with your install disk and running the extended test on a loop.
  3. cmaier macrumors G5

    Jul 25, 2007
    I find it weird that you removed the apple RAM, and not the non-Apple RAM. I would have removed anything I, myself, added (i.e.: non-Apple RAM).

    i still think you should swap back in the apple ram and remove the 3rd party ram, and see what happens. It could be that all of the RAM is fine, but that mixing the two types is causing the problem.
  4. milk242 macrumors 6502a

    Jun 28, 2007
  5. Dr.Pants macrumors 65816


    Jan 8, 2009
    Well, you never know. The OP could have gotten a bad stick of Apple RAM. Statistically, it has to exist:rolleyes:

    Although yes, I would have thought that a third-party addition would be the cause of the problem, too, but I wouldn't rule anything out, Apple or not. Paranoid? Yes, but effective.

Share This Page