Mac Pro 6,1 hardware issues - correlation?

Discussion in 'Mac Pro' started by GandalfTheGrey, Sep 7, 2015.

  1. GandalfTheGrey macrumors newbie

    GandalfTheGrey

    Joined:
    Jul 25, 2012
    #1
    My intention with this post is not to have someone address all of my problems individually, but rather see if there is a correlation between them that would all point to one thing.

    I bought a new Mac Pro back in April, 2015, and it's been nothing but headaches since day 1. Here's what ails me:

    1. Graphic glitches across all three monitors. - Usually soon after startup. Just short horizontal glitches that mess up the picture for a split second. It comes and goes. I took it into the Apple store for this a week ago and they replaced "graphics board A", and that changed absolutely nothing.

    2. Crash + Kernal Panic - Once or twice per week when I get up in the morning and the machine has been hibernating all night, I go to wake it and it crashes and restarts, and then gives me this kernal panic report: (Yes I know it's unusually short, but very consistently the same. I think I've gotten it maybe 10 times now)

    *** MCA Error Report ***
    CPU Machine Check Architecture Error Dump (CPU: Intel(R) Xeon(R) CPU E5-1680 v2 @ 3.00GHz, CPUID: 0x306E4)
    Core: 0
    IA32_MC20_STATUS=0xFE200000000C110A
    IA32_MC20_CTL=0x0
    IA32_MC20_ADDR=0xA0660080
    IA32_MC20_MISC=0xA0FC381602802086
    Core: 0
    IA32_MC21_STATUS=0xFE200000000C110A
    IA32_MC21_CTL=0x0
    IA32_MC21_ADDR=0xA0601440
    IA32_MC21_MISC=0x88FC38160A802086
    Core: 0
    IA32_MC24_STATUS=0xFE200000000C110A
    IA32_MC24_CTL=0x0
    IA32_MC24_ADDR=0xA0660040
    IA32_MC24_MISC=0xB0FC385610802086
    That's the entire thing, minus the machine specs at the bottom. Didn't want to crowd an already lengthy post. Last time it happened it also reset my screensaver to the default option. For some reason.

    3. CPU idles at 25% - Even when I have no open programs, all 8 cores are constantly going nuts. I know this because I have MenuMeters installed, but Activity Monitor confirms it. Screen shot attached in which you can see there are almost no programs using any CPU, like total it's less than 2%, and the system report at the bottom claims it's at 25% capacity. It never ever goes below that. The CPU temperature is always at least 140ºF shortly after startup and the fan is always running at about 1300rpms.

    4. Massive latency in Logic - This is a can of worms on its own, because latency can be caused by a billion things, but it's odd that such a fast machine (allegedly) will start an open session with no latency, and then after a half hour or so will have an entire second of it. This includes MIDI input, as in there's a massive lull between when I hit a key on my keyboard, and when Logic will play back the appropriate sample.

    5. SMC resets - Once or twice a month I wake up the machine and everything is running at about 1/1000th the normal speed. Literally. Even the mouse only refreshes about once per second. The only way to fix it is to shut down, unplug the machine and hold the power button down while it's unplugged to drain all remaining power from the unit, then restart.

    6. Won't access the Audio Interface even though it's recognized - In System Preferences > Sound, it shows that my Focusrite Scarlett 18i20 is there, plugged in, but if I select it, it won't play any sound, and in fact if I select a WAV file on my computer and hit space (to have it "preview") it won't play at all. The only way I've found to get it to work is to open logic, and change the audio device setting back and forth between that and the built in output, usually after 5 or 6 times it starts working properly.

    Any help would be greatly appreciated. Thank you.

    -Stephen

    MacPro 6,1
    OSX 10.10.5
    8-Core Intel Xeon E5 3 GHz
    Number of Processors:1
    Total Number of Cores:8
    L2 Cache (per Core):256 KB
    L3 Cache:25 MB
    Memory:64 GB (third party - OWC)
    AMD FirePro D700 6144 MB
    Boot ROM Version:MP61.0116.B15
    SMC Version (system):2.20f18

    Attached hardware: 3 thunderbolt monitors, 3 external hard drives( 1 USB, 2 TB), Audio Interface (USB), Mouse, Keyboard.

    Screen Shot 2015-09-07 at 12.07.02 PM.png
     
  2. edanuff macrumors 6502

    Joined:
    Oct 30, 2008
    #2
    That does sound like a GPU problem. My understanding is that it's the "B" board that controls the displays, though, so if the service report actually says board "A" was replaced, they might have made a mistake. It does sound like some of the problems you're experiencing are what people have seen with nMPS that Apple has ended up replacing, so you might want to continue to document all of these issues and take it back in.
     
  3. filmak macrumors 6502a

    Joined:
    Jun 21, 2012
    Location:
    between earth and heaven
    #3
    Are your TB monitors connected after the external disks or on the same TB port/bus?
    Disconnect, for testing purposes, the disks and connect only the monitors.

    If this fixes the issue try to connect them in different ports not in a chain ...
     
  4. GandalfTheGrey thread starter macrumors newbie

    GandalfTheGrey

    Joined:
    Jul 25, 2012
    #4
    I have each monitor plugged into a seperate TB port, in compliance with Apple's recommended configuration (the 6 ports are divided into three pairs, and only one monitor should be plugged into one pair).
     
  5. poematik13 macrumors 6502a

    Joined:
    Jun 5, 2014
    #5
    I had the same exact issues as you outlined in parts 1 and 2 of your post. I took it in to the store last week, they replaced one of the GPU's, and now the computer has been working fine since then.

    The verdict online seems to be split between this being an OS X issue and/or it being actually a defective design with the 6,1- the GPU's overheat easy and fail because of all the parts being crammed into a tiny case. Only time will tell.

    I learned my lesson though. 1) never buy the first gen redesign of an apple product and 2) if the product fails within 2 months of purchase, get apple care because its probably gonna fail regularly.
     
  6. GandalfTheGrey thread starter macrumors newbie

    GandalfTheGrey

    Joined:
    Jul 25, 2012
    #6
    Yep looks like I'm gonna have to pay them ANOTHER visit. I just have to plan it carefully because anytime I go in there I don't see my machine for a week.

    Thanks for the input!
     
  7. poematik13 macrumors 6502a

    Joined:
    Jun 5, 2014
    #8
    if you have apple joint venture program they give you a loaner computer for the time it takes to repair
     
  8. Barry Bishop macrumors member

    Barry Bishop

    Joined:
    Aug 19, 2015
    #9
    Same thing is happening to me:

    nonymous UUID: FC326DD7-050B-CCD4-1FB3-DC1F7A43C1BE


    Sat May 21 08:55:00 2016


    *** MCA Error Report ***

    CPU Machine Check Architecture Error Dump (CPU: Intel(R) Xeon(R) CPU E5-1650 v2 @ 3.50GHz, CPUID: 0x306E4)

    Core: 0 1

    IA32_MC3_STATUS=0xF200000000800400

    IA32_MC3_CTL=0x0

    Core: 0

    IA32_MC18_STATUS=0xFE200000000C110A

    IA32_MC18_CTL=0x0

    IA32_MC18_ADDR=0xEEA00040

    IA32_MC18_MISC=0x5CFC781600802086



    Model: MacPro6,1, BootROM MP61.0116.B16, 6 processors, 6-Core Intel Xeon E5, 3.5 GHz, 64 GB, SMC 2.20f18

    Graphics: AMD FirePro D700, AMD FirePro D700, PCIe, 6144 MB

    Graphics: AMD FirePro D700, AMD FirePro D700, PCIe, 6144 MB

    Memory Module: DIMM1, 16 GB, DDR3 ECC, 1866 MHz, 0x80CE, 0x4D33393342324737304442302D434D412020

    Memory Module: DIMM2, 16 GB, DDR3 ECC, 1866 MHz, 0x80CE, 0x4D33393342324737304442302D434D412020

    Memory Module: DIMM3, 16 GB, DDR3 ECC, 1866 MHz, 0x80CE, 0x4D33393342324737304442302D434D412020

    Memory Module: DIMM4, 16 GB, DDR3 ECC, 1866 MHz, 0x80CE, 0x4D33393342324737304442302D434D412020

    AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x135), Broadcom BCM43xx 1.0 (7.15.166.24.3)

    Bluetooth: Version 4.3.6f3 16238, 3 services, 27 devices, 1 incoming serial ports

    PCI Card: AMD FirePro D700, Display Controller, Slot-1

    PCI Card: AMD FirePro D700, Display Controller, Slot-2

    PCI Card: pci1b73,1100, USB eXtensible Host Controller, Thunderbolt@236,0,0

    PCI Card: ethernet, Ethernet Controller, Thunderbolt@235,0,0

    PCI Card: pci1b73,1100, USB eXtensible Host Controller, Thunderbolt@234,0,0

    PCI Card: pci11c1,5901, IEEE 1394 Open HCI, Thunderbolt@233,0,0

    PCI Card: pci1b21,612, AHCI Controller, Thunderbolt@158,0,0

    PCI Card: pci1b21,612, AHCI Controller, Thunderbolt@157,0,0

    PCI Card: pci1b21,612, AHCI Controller, Thunderbolt@156,0,0

    PCI Card: pci1b21,612, AHCI Controller, Thunderbolt@155,0,0

    Serial ATA Device: APPLE SSD SM0512F, 500.28 GB

    Serial ATA Device: TOSHIBA MD04ACA400, 4 TB

    Serial ATA Device: TOSHIBA MD04ACA400, 4 TB

    Serial ATA Device: TOSHIBA MD04ACA400, 4 TB

    Serial ATA Device: TOSHIBA MD04ACA400, 4 TB

    USB Device: Hub

    USB Device: BRCM20702 Hub

    USB Device: Bluetooth USB Host Controller

    USB Device: USB OPTICAL MOUSE

    USB Device: Keyboard Hub

    USB Device: Apple Keyboard

    USB Device: USB DONGLE

    USB Device: USB audio CODEC

    USB Device: i1Display3

    Thunderbolt Bus: Mac Pro, Apple Inc., 19.2

    Thunderbolt Bus: Mac Pro, Apple Inc., 19.2

    Thunderbolt Device: ThunderBay 4, Other World Computing, 3, 24.2

    Thunderbolt Bus: Mac Pro, Apple Inc., 19.2

    Thunderbolt Device: Thunderbolt 2 Dock, Other World Computing, Inc., 3, 25.1
     

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