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Mac Pro shut down on its own, after re-boot it beeped for 2 minutes

I put my Mac Pro to sleep then the next day I find it completely shut down! I boot it up and then I hear a steady beep (every second) for about 2 minutes. After 2 minutes the beeping went away.
Any idea what caused the Mac Pro to shut down on its own? And what does the steady beeping mean? The beeping is coming from inside the Mac Pro’s speakers, not from my BOSE 5 computer speakers. I did a google on the topic and nobody seems to really know.
I don’t think there was a power outage as the UPS is fully charged, and I asked a neighbor across the street.

Comments: 3 Responses to “Mac Pro shut down on its own, after re-boot it beeped for 2 minutes”

    10 years ago

    Beeps at startup usually mean memory issues. Have you recently added memory or changed memory?
    The first thing I would do is to make sure your Time Machine backup is up-to-date and do any secondary backups that you keep as part of your routine.
    Then I would do a restart and see if the beeps happen again.

    10 years ago

    Yes, it still beeps every second for about 2-3 minutes. It takes a long time to restart/boot-up, about 1-2 minutes when in the past it would take seconds because I have a SSD for my start-up drive. I do hear the startup chime though.

    I currently have 6GB of RAM that came with the machine. If memory is the problem, and I was planning on upgrading memory anyway. How much should I add? 12GB (4GB x 3) or 24GB (8GB x 3)? The most strenuous thing I do is video editing. I think upgrading GPU is more beneficial?? So go 12GB of RAM and get the Radeon 5870? I have the Radeon 4870 now.

    10 years ago

    My guess is that it is a memory issue. But if it is still happening I would take it to a shop to have it looked it. Do that before investing more money into the machine.
    As for RAM, the more the better. I think RAM might help more than a new graphics card.

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