Resolved cMP 2010 pre-chime lag?

Discussion in 'Mac Pro' started by Zeke D, Oct 21, 2018.

  1. Zeke D, Oct 21, 2018
    Last edited: Oct 22, 2018

    Zeke D macrumors 65816

    Zeke D

    Joined:
    Nov 18, 2011
    Location:
    Arizona
    #1
    So, what's up with the pre-chime lag with my cMP 2010? it's like 20 seconds until chime.

    :02 - Power on
    :22 - Chime
    :36 - Login Screen
    :47 - Desktop
    :52 - Helpers/apps loaded

    2010 Mac Pro 5,1 (140 bootROM)
    2x Xeon HC X5670
    32GB Samsung RAM (4x 8GB)
    Samsung SM951 128GB in a generic 4x PCIe adapter (slot #3)
    MSI GTX680Ti 2GB
    OSX Sierra 10.12.6

     
  2. crjackson2134, Oct 21, 2018
    Last edited: Oct 21, 2018

    crjackson2134 macrumors 601

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #2
    This most likely....

    If it’s your boot drive, then Definitely... It’s a known issue, had it myself...

    Just for grins, put it in slot2 and see if it changes.

    EDIT: Now that Lou has chimed in, I’m pretty sure the delay I was thinking about came AFTER the chime. Soooo, no clue. Sorry.
     
  3. flowrider macrumors 603

    flowrider

    Joined:
    Nov 23, 2012
    #3
    Just did mine - SM951, AHCI, 512GB. - 11 secs. Mine is in Slot 3!

    Lou
     
  4. crjackson2134, Oct 21, 2018
    Last edited: Oct 21, 2018

    crjackson2134 macrumors 601

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #4
    Come to think of it, Lou. The delay I’m thinking of comes AFTER the chime. Good catch.

    Here are mine...

    A9F0EFCB-1F2D-4989-B9B2-0379585F56F0.jpeg
     
  5. kohlson, Oct 21, 2018
    Last edited: Oct 22, 2018

    kohlson macrumors 68000

    Joined:
    Apr 23, 2010
    #5
    It's my understanding that the chime is an audible signal that your system has passed Power On Self Test (POST). This is test of the essential components to make sure that the next step, including booting the OS, can occur.

    Part of that is a memory test. The more memory, the longer the time before the chime. If I understand this correctly, try taking some memory out and see if the POST time is reduced.

    My total boot up time is now longer once I went from 8 to 32 GB, and put a boot disk on a PCIe card.
     
  6. crjackson2134 macrumors 601

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #6
    You are correct.
     
  7. Zeke D, Oct 22, 2018
    Last edited: Oct 22, 2018

    Zeke D thread starter macrumors 65816

    Zeke D

    Joined:
    Nov 18, 2011
    Location:
    Arizona
    #7
    That makes sense. I'm running 32GB, and before I was running 8GB. I guess a cold boot time of ~40 seconds will just have to do...
     
  8. haralds macrumors 6502a

    haralds

    Joined:
    Jan 3, 2014
    Location:
    Silicon Valley, CA
    #8
    I have 48GB and the cold boot delay is substantial due to self test.
     
  9. startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #9
    Uuh, mine is high and I am at 128GB RAM... :)
    BTW isn't there a verbose switch for troubleshooting?
     
  10. crjackson2134, Oct 29, 2018
    Last edited: Oct 29, 2018

    crjackson2134 macrumors 601

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #10
    CMD + V

    Hold down these keys while booting, but if you don’t have an EFI GPU you see the output.
     
  11. DearthnVader macrumors 6502a

    DearthnVader

    Joined:
    Dec 17, 2015
    Location:
    Red Springs, NC
    #11
    Mixing memory can give a long delay before you hear the chime.

    I went from 2GB 800Mhz RAM, and added 6GB 667Mhz RAM, and that gives me a really long delay, as the system has to read the ram types, set all the ram to 667Mhz, then do the other ram test stuff for POST, then I hear the chime.
     

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10 October 21, 2018