iMac freezing after putting screen saver on... due to newly installed RAM?

Discussion in 'iMac' started by sparkie7, Apr 20, 2017.

  1. sparkie7 macrumors 68010

    sparkie7

    Joined:
    Oct 17, 2008
    #1
    I just installed 16GB RAM into my 2009 iMac 27". Now when I put it on screen saver it freezes, is it due to the new RAM I just installed? Here's the error report, can anyone decipher what it the issue?

    Problems Details and System Configuration:

    Interval Since Last Panic Report: 7145630 sec
    Panics Since Last Report: 2
    Anonymous UUID: B98CD9CE-6251-4C1D-AB40-CCA87B633621

    Thu Apr 20 17:25:45 2017
    panic(cpu 4 caller 0x294c5f): "pmap_pv_remove(0x1ca307b4,0x8fe0a000,0xc206, 0xc206024): null pv_list!"@/SourceCache/xnu/xnu-1504.15.3/osfmk/i386/pmap_internal.h:671
    Backtrace (CPU 4), Frame : Return Address (4 potential args on stack)
    0x947f3ac8 : 0x21b837 (0x5dd7fc 0x947f3afc 0x223ce1 0x0)
    0x947f3b18 : 0x294c5f (0x59b128 0x1ca307b4 0x8fe0a000 0x0)
    0x947f3c48 : 0x29555c (0x1ca307b4 0x8fe00000 0x0 0x8baee000)
    0x947f3cb8 : 0x2615b0 (0x1ca307b4 0x8fe00000 0x0 0x8fe42000)
    0x947f3de8 : 0x261b4b (0xffe00000 0x0 0x0 0x0)
    0x947f3e28 : 0x22ca96 (0x1d2fb148 0x0 0x0 0xffe00000)
    0x947f3e78 : 0x481892 (0x1d3251f4 0xb 0x1d4a63d4 0x325477a8)
    0x947f3ec8 : 0x48d017 (0x1e7c92a0 0xb 0x0 0x1e7c93b0)
    0x947f3f38 : 0x48fec0 (0xb 0x947f3fa0 0x2 0x1)
    0x947f3f68 : 0x219432 (0x325477a8 0xffffff7f 0x947f3fc8 0x295c57)
    0x947f3fa8 : 0x2aacb4 (0xffffffff 0x1 0x947f3fc8 0x324d5700)
    0x947f3fc8 : 0x2a1976 (0x0 0x0 0x10 0x324d5700)

    BSD process name corresponding to current thread: fpsaud

    Mac OS version:
    10K549

    Kernel version:
    Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
    System model name: iMac11,1 (Mac-F2268DAE)

    System uptime in nanoseconds: 6066160810788
    1 pagetable corruption incident(s) detected, timeout: 0
    Incident 0x1, reason: 0x0, action: 0x1, time: 0x584635ad2b7
    unloaded kexts:
    com.apple.driver.AppleUSBUHCI 4.2.0 (addr 0x11b3000, size 0x65536) – last unloaded 118135702052
    loaded kexts:
    at.obdev.nke.LittleSnitch 2.4.4
    com.apple.driver.AppleBluetoothMultitouch 54.3
    com.apple.driver.AGPM 100.12.31
    com.apple.filesystems.autofs 2.1.0
    com.apple.driver.AppleHWSensor 1.9.3d0
    com.apple.driver.AppleMikeyHIDDriver 1.2.0
    com.apple.driver.AppleUpstreamUserClient 3.5.7
    com.apple.driver.AppleMCCSControl 1.0.20
    com.apple.driver.AppleHDA 2.0.5f14
    com.apple.kext.ATIFramebuffer 6.3.6
    com.apple.driver.AppleMikeyDriver 2.0.5f14
    com.apple.driver.AudioAUUC 1.57
    com.apple.ATIRadeonX2000 6.3.6
    com.apple.Dont_Steal_Mac_OS_X 7.0.0
    com.apple.driver.AudioIPCDriver 1.1.6
    com.apple.driver.AirPort.Atheros21 425.14.7
    com.apple.driver.ACPI_SMC_PlatformPlugin 4.7.0a1
    com.apple.driver.AppleLPC 1.5.1
    com.apple.driver.AppleBacklight 170.0.46
    com.apple.driver.AppleUSBCardReader 2.6.1
    com.apple.driver.AppleIRController 303.8
    com.apple.iokit.SCSITaskUserClient 2.6.8
    com.apple.BootCache 31.1
    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
    com.apple.iokit.IOAHCIBlockStorage 1.6.4
    com.apple.driver.AppleFWOHCI 4.7.3
    com.apple.driver.AppleUSBHub 4.2.4
    com.apple.iokit.AppleBCM5701Ethernet 3.0.5b8
    com.apple.driver.AppleEFINVRAM 1.4.0
    com.apple.driver.AppleAHCIPort 2.1.7
    com.apple.driver.AppleUSBEHCI 4.2.4
    com.apple.driver.AppleACPIButtons 1.3.6
    com.apple.driver.AppleRTC 1.3.1
    com.apple.driver.AppleHPET 1.5
    com.apple.driver.AppleSMBIOS 1.7
    com.apple.driver.AppleACPIEC 1.3.6
    com.apple.driver.AppleAPIC 1.4
    com.apple.driver.AppleIntelCPUPowerManagementClient 142.6.0
    com.apple.security.sandbox 1
    com.apple.security.quarantine 0
    com.apple.nke.applicationfirewall 2.1.14
    com.apple.driver.AppleIntelCPUPowerManagement 142.6.0
    com.apple.driver.AppleBluetoothHIDKeyboard 141.5 – last loaded 51734230463
    com.apple.driver.AppleHIDKeyboard 141.5
    com.apple.driver.IOBluetoothHIDDriver 2.4.5f3
    com.apple.driver.AppleMultitouchDriver 207.11
    com.apple.driver.AppleProfileReadCounterAction 17
    com.apple.driver.DspFuncLib 2.0.5f14
    com.apple.driver.AppleProfileTimestampAction 10
    com.apple.driver.AppleProfileThreadInfoAction 14
    com.apple.driver.AppleProfileRegisterStateAction 10
    com.apple.driver.AppleProfileKEventAction 10
    com.apple.driver.AppleProfileCallstackAction 20
    com.apple.driver.AppleSMBusController 1.0.10d0
    com.apple.kext.ATI4800Controller 6.3.6
    com.apple.kext.ATISupport 6.3.6
    com.apple.iokit.IOFireWireIP 2.0.3
    com.apple.iokit.IOSurface 74.2
    com.apple.iokit.IOBluetoothSerialManager 2.4.5f3
    com.apple.iokit.IOSerialFamily 10.0.3
    com.apple.iokit.IOAudioFamily 1.8.3fc2
    com.apple.kext.OSvKernDSPLib 1.3
    com.apple.driver.AppleHDAController 2.0.5f14
    com.apple.iokit.IOHDAFamily 2.0.5f14
    com.apple.iokit.IO80211Family 320.1
    com.apple.iokit.AppleProfileFamily 41
    com.apple.driver.AppleSMC 3.1.0d5
    com.apple.driver.IOPlatformPluginFamily 4.7.0a1
    com.apple.driver.AppleSMBusPCI 1.0.10d0
    com.apple.driver.AppleBacklightExpert 1.0.1
    com.apple.iokit.IONDRVSupport 2.2.1
    com.apple.iokit.IOGraphicsFamily 2.2.1
    com.apple.driver.BroadcomUSBBluetoothHCIController 2.4.5f3
    com.apple.driver.AppleUSBBluetoothHCIController 2.4.5f3
    com.apple.iokit.IOBluetoothFamily 2.4.5f3
    com.apple.iokit.IOSCSIBlockCommandsDevice 2.6.8
    com.apple.iokit.IOUSBMassStorageClass 2.6.7
    com.apple.iokit.IOUSBHIDDriver 4.2.0
    com.apple.driver.AppleUSBMergeNub 4.2.4
    com.apple.driver.AppleUSBComposite 3.9.0
    com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.8
    com.apple.iokit.IOBDStorageFamily 1.6
    com.apple.iokit.IODVDStorageFamily 1.6
    com.apple.iokit.IOCDStorageFamily 1.6.1
    com.apple.driver.XsanFilter 402.1
    com.apple.iokit.IOAHCISerialATAPI 1.2.6
    com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.8
    com.apple.iokit.IOFireWireFamily 4.2.6
    com.apple.iokit.IOUSBUserClient 4.2.4
    com.apple.iokit.IONetworkingFamily 1.10
    com.apple.iokit.IOAHCIFamily 2.0.6
    com.apple.iokit.IOUSBFamily 4.2.4
    com.apple.driver.AppleEFIRuntime 1.4.0
    com.apple.iokit.IOHIDFamily 1.6.6
    com.apple.iokit.IOSMBusFamily 1.1
    com.apple.kext.AppleMatch 1.0.0d1
    com.apple.security.TMSafetyNet 6
    com.apple.driver.DiskImages 289.1
    com.apple.iokit.IOStorageFamily 1.6.3
    com.apple.driver.AppleACPIPlatform 1.3.6
    com.apple.iokit.IOPCIFamily 2.6.5
    com.apple.iokit.IOACPIFamily 1.3.0
    Model: iMac11,1, BootROM IM111.0034.B02, 4 processors, Intel Core i7, 2.8 GHz, 20 GB, SMC 1.54f36
    Graphics: ATI Radeon HD 4850, ATI Radeon HD 4850, PCIe, 512 MB
    Memory Module: global_name
    AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 2.1.14.6
    Bluetooth: Version 2.4.5f3, 2 service, 19 devices, 1 incoming serial ports
    Network Service: Ethernet, Ethernet, en0
    Serial ATA Device: ST31000528AS, 931.51 GB
    Serial ATA Device: OPTIARC DVD RW AD-5680H
    USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
    USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
    USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8215, 0xfa111000 / 5
    USB Device: Internal Memory Card Reader, 0x05ac (Apple Inc.), 0x8403, 0xfa120000 / 3
    USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
    USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0xfd120000 / 4
    USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8502, 0xfd110000 / 3
     
  2. eRondeau macrumors 6502a

    eRondeau

    Joined:
    Mar 3, 2004
    Location:
    Canada's South Coast
    #2
    About 15 lines from the bottom you see a short system profile and it thinks you've got 20GB RAM, not 16. So yup something's messed up. I've installed bad RAM on my iMac before and it led to intermittent wonky behaviour including kernel panics & system freezes. Try dropping back to 8GB and see if the problems continue.
     
  3. sparkie7, Apr 20, 2017
    Last edited: Apr 20, 2017

    sparkie7 thread starter macrumors 68010

    sparkie7

    Joined:
    Oct 17, 2008
    #3
    Sorry I forgot to say that I added 16GB (2x 8GB) to the 4GB (2x 2GB) that came with the machine. So yes there is 20GB RAM total

    In the System preferences/specs page - the RAM modules say OK. So not sure if the name RAM is defective.

    I do have the computer on sleep after 15 minutes. Wondering if this is causing the freezing. But surely the iMac should wake when you press the keyboard or mouse?

    Is there an application to check the RAM installed? I think I have lost the DVD diagnostic to do the hardware test..
     
  4. nambuccaheadsau macrumors 65816

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia
    #4
    Run Memtest OS X over it. Link included.

    Was the memory Apple compatible low density modules, the same as the original 4GB and from a Mac specialist such as Crucial orOWC?

    Also increased memory can result in boot and wake slow downs.


    http://www.memtestosx.org
     
  5. sparkie7 thread starter macrumors 68010

    sparkie7

    Joined:
    Oct 17, 2008
    #5
    Thanks for link. Do I have to burn into a DVD to run memtest?

    Memory was bought from Ramcity.com.au

    Spec:

    MAR3S1067T8G28X2 iRAM 16GB Kit (8GBx2) PC3-8500 204-pin SO-DIMM for Apple For: Not Specified;

    When you say wake slow downs - are we talking seconds or minutes? The wireless keyboard and mouse do nothing when pressed to wake the iMac, no green light on keyboard even. The only way I could get it going was to hold the on/off button on the back to hard shutdown and press again to restart. Unless it needs several minutes to wake?
     
  6. nambuccaheadsau, Apr 20, 2017
    Last edited: Apr 20, 2017

    nambuccaheadsau macrumors 65816

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia
    #6
    Never had a 2009 iMac but I would think 10-15 seconds.I would suggest easier to whack it onto a USB thumb drive.

    Regarding Bluetooth, it should be there in all 24" and 27" models. They run Bluetooth version 2.1 and if the keyboard and mouse require later versions, you may have to look to see if you can replace the card. Cards do fail so check out Apple System Profiler (About This Mac) and see what is says under WiFI.

    If the keyboard and mouse have not been used before, you may well need a wired unit to set it up. Have you tried turning the units on, going into System Preferences > Bluetooth. Turn On and Pair?
     
  7. sparkie7 thread starter macrumors 68010

    sparkie7

    Joined:
    Oct 17, 2008
    #7
    Freezed up again, after leaving on sleep over night...

    Report seems different, can anyone decipher?

    Interval Since Last Panic Report: 7145620 sec
    Panics Since Last Report: 3
    Anonymous UUID: B98CD9CE-6251-4C1D-AB40-CCA87B633621

    Sat Apr 22 12:56:12 2017
    panic(cpu 2 caller 0x2abf6a): Kernel trap at 0x0032eb49, type 14=page fault, registers:
    CR0: 0x8001003b, CR2: 0x00000134, CR3: 0x00100000, CR4: 0x00000660
    EAX: 0x270b3f18, EBX: 0x0000012c, ECX: 0x27100a40, EDX: 0x26e59b98
    CR2: 0x00000134, EBP: 0x9479bf08, ESI: 0x00000000, EDI: 0x1ccb1e04
    EFL: 0x00010202, EIP: 0x0032eb49, CS: 0x00000008, DS: 0x94790010
    Error code: 0x00000000

    Backtrace (CPU 2), Frame : Return Address (4 potential args on stack)
    0x9479bcf8 : 0x21b837 (0x5dd7fc 0x9479bd2c 0x223ce1 0x0)
    0x9479bd48 : 0x2abf6a (0x59e3d0 0x32eb49 0xe 0x59e59a)
    0x9479be28 : 0x2a1a78 (0x9479be40 0x9479bea8 0x9479bf08 0x32eb49)
    0x9479be38 : 0x32eb49 (0xe 0x94790048 0x10 0x10)
    0x9479bf08 : 0x342add (0x1ccb1e04 0x342c09 0x9479bf38 0x8ba06000)
    0x9479bf78 : 0x230235 (0x1ccb1e04 0x0 0x0 0x0)
    0x9479bfc8 : 0x2a179c (0x863ea0 0x0 0x10 0x1d18d184)

    BSD process name corresponding to current thread: kernel_task

    Mac OS version:
    10K549

    Kernel version:
    Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
    System model name: iMac11,1 (Mac-F2268DAE)

    System uptime in nanoseconds: 2800445453280
    unloaded kexts:
    com.apple.driver.AppleUSBUHCI 4.2.0 (addr 0x11b3000, size 0x65536) – last unloaded 141099828898
    loaded kexts:
    at.obdev.nke.LittleSnitch 2.4.4
    com.apple.driver.AppleBluetoothMultitouch 54.3
    com.apple.driver.AGPM 100.12.31
    com.apple.driver.AppleHWSensor 1.9.3d0
    com.apple.driver.AppleMikeyHIDDriver 1.2.0
    com.apple.driver.AppleUpstreamUserClient 3.5.7
    com.apple.driver.AppleMCCSControl 1.0.20
    com.apple.driver.AppleHDA 2.0.5f14
    com.apple.kext.ATIFramebuffer 6.3.6
    com.apple.driver.AppleMikeyDriver 2.0.5f14
    com.apple.driver.AudioAUUC 1.57
    com.apple.ATIRadeonX2000 6.3.6
    com.apple.filesystems.autofs 2.1.0
    com.apple.Dont_Steal_Mac_OS_X 7.0.0
    com.apple.driver.AudioIPCDriver 1.1.6
    com.apple.driver.AirPort.Atheros21 425.14.7
    com.apple.driver.ACPI_SMC_PlatformPlugin 4.7.0a1
    com.apple.driver.AppleLPC 1.5.1
    com.apple.driver.AppleBacklight 170.0.46
    com.apple.driver.AppleIRController 303.8
    com.apple.driver.AppleUSBCardReader 2.6.1
    com.apple.iokit.SCSITaskUserClient 2.6.8
    com.apple.BootCache 31.1
    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
    com.apple.iokit.IOAHCIBlockStorage 1.6.4
    com.apple.driver.AppleFWOHCI 4.7.3
    com.apple.driver.AppleUSBHub 4.2.4
    com.apple.iokit.AppleBCM5701Ethernet 3.0.5b8
    com.apple.driver.AppleEFINVRAM 1.4.0
    com.apple.driver.AppleAHCIPort 2.1.7
    com.apple.driver.AppleUSBEHCI 4.2.4
    com.apple.driver.AppleACPIButtons 1.3.6
    com.apple.driver.AppleRTC 1.3.1
    com.apple.driver.AppleHPET 1.5
    com.apple.driver.AppleSMBIOS 1.7
    com.apple.driver.AppleACPIEC 1.3.6
    com.apple.driver.AppleAPIC 1.4
    com.apple.driver.AppleIntelCPUPowerManagementClient 142.6.0
    com.apple.security.sandbox 1
    com.apple.security.quarantine 0
    com.apple.nke.applicationfirewall 2.1.14
    com.apple.driver.AppleIntelCPUPowerManagement 142.6.0
    com.apple.driver.AppleBluetoothHIDKeyboard 141.5 – last loaded 24922398010
    com.apple.driver.AppleHIDKeyboard 141.5
    com.apple.driver.IOBluetoothHIDDriver 2.4.5f3
    com.apple.driver.AppleMultitouchDriver 207.11
    com.apple.driver.AppleProfileReadCounterAction 17
    com.apple.driver.DspFuncLib 2.0.5f14
    com.apple.driver.AppleProfileTimestampAction 10
    com.apple.driver.AppleProfileThreadInfoAction 14
    com.apple.driver.AppleProfileRegisterStateAction 10
    com.apple.driver.AppleProfileKEventAction 10
    com.apple.driver.AppleProfileCallstackAction 20
    com.apple.driver.AppleSMBusController 1.0.10d0
    com.apple.kext.ATI4800Controller 6.3.6
    com.apple.kext.ATISupport 6.3.6
    com.apple.iokit.IOFireWireIP 2.0.3
    com.apple.iokit.IOSurface 74.2
    com.apple.iokit.IOBluetoothSerialManager 2.4.5f3
    com.apple.iokit.IOSerialFamily 10.0.3
    com.apple.iokit.IOAudioFamily 1.8.3fc2
    com.apple.kext.OSvKernDSPLib 1.3
    com.apple.driver.AppleHDAController 2.0.5f14
    com.apple.iokit.IOHDAFamily 2.0.5f14
    com.apple.iokit.IO80211Family 320.1
    com.apple.iokit.AppleProfileFamily 41
    com.apple.driver.AppleSMC 3.1.0d5
    com.apple.driver.IOPlatformPluginFamily 4.7.0a1
    com.apple.driver.AppleSMBusPCI 1.0.10d0
    com.apple.driver.AppleBacklightExpert 1.0.1
    com.apple.iokit.IONDRVSupport 2.2.1
    com.apple.iokit.IOGraphicsFamily 2.2.1
    com.apple.driver.BroadcomUSBBluetoothHCIController 2.4.5f3
    com.apple.driver.AppleUSBBluetoothHCIController 2.4.5f3
    com.apple.iokit.IOBluetoothFamily 2.4.5f3
    com.apple.iokit.IOUSBHIDDriver 4.2.0
    com.apple.iokit.IOSCSIBlockCommandsDevice 2.6.8
    com.apple.iokit.IOUSBMassStorageClass 2.6.7
    com.apple.driver.AppleUSBMergeNub 4.2.4
    com.apple.driver.AppleUSBComposite 3.9.0
    com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.8
    com.apple.iokit.IOBDStorageFamily 1.6
    com.apple.iokit.IODVDStorageFamily 1.6
    com.apple.iokit.IOCDStorageFamily 1.6.1
    com.apple.driver.XsanFilter 402.1
    com.apple.iokit.IOAHCISerialATAPI 1.2.6
    com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.8
    com.apple.iokit.IOFireWireFamily 4.2.6
    com.apple.iokit.IOUSBUserClient 4.2.4
    com.apple.iokit.IONetworkingFamily 1.10
    com.apple.iokit.IOAHCIFamily 2.0.6
    com.apple.iokit.IOUSBFamily 4.2.4
    com.apple.driver.AppleEFIRuntime 1.4.0
    com.apple.iokit.IOHIDFamily 1.6.6
    com.apple.iokit.IOSMBusFamily 1.1
    com.apple.kext.AppleMatch 1.0.0d1
    com.apple.security.TMSafetyNet 6
    com.apple.driver.DiskImages 289.1
    com.apple.iokit.IOStorageFamily 1.6.3
    com.apple.driver.AppleACPIPlatform 1.3.6
    com.apple.iokit.IOPCIFamily 2.6.5
    com.apple.iokit.IOACPIFamily 1.3.0
    Model: iMac11,1, BootROM IM111.0034.B02, 4 processors, Intel Core i7, 2.8 GHz, 20 GB, SMC 1.54f36
    Graphics: ATI Radeon HD 4850, ATI Radeon HD 4850, PCIe, 512 MB
    Memory Module: global_name
    AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 2.1.14.6
    Bluetooth: Version 2.4.5f3, 2 service, 19 devices, 1 incoming serial ports
    Network Service: Ethernet, Ethernet, en0
    Serial ATA Device: ST31000528AS, 931.51 GB
    Serial ATA Device: OPTIARC DVD RW AD-5680H
    USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
    USB Device: Internal Memory Card Reader, 0x05ac (Apple Inc.), 0x8403, 0xfa120000 / 4
    USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 3
    USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8215, 0xfa111000 / 5
    USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
    USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8502, 0xfd110000 / 4
    USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0xfd120000 / 3
     
  8. sparkie7 thread starter macrumors 68010

    sparkie7

    Joined:
    Oct 17, 2008
    #8
    http://www.everymac.com/systems/app...-i7-2.8-27-inch-aluminum-late-2009-specs.html

    " if it is running Mac OS X 10.6.3 "Snow Leopard" or higher in 64-bit mode and has been updated to use the latest EFI version. It is limited to 16 GB of RAM in 32-bit mode."

    -- I am running the later 10.6.8 – so should be ok?
    -- in 64 bit mode? — how does one check it its running in this mode.
    -- updated to use the latest EFI version. --is there a specific download for this EFI patch?


    I just went to  > Software Update. Says it's all up to date.
     
  9. eRondeau macrumors 6502a

    eRondeau

    Joined:
    Mar 3, 2004
    Location:
    Canada's South Coast
    #9
    I think it's pretty clear that one or both of your new 8GB RAM chips are faulty. Pull them both out and return them to the seller. They'll send you new ones that hopefully will work properly. That's life.
     
  10. sparkie7 thread starter macrumors 68010

    sparkie7

    Joined:
    Oct 17, 2008
    #10
    Went to work and pressed the keyboard and the iMac wakes without any problems. So it's got to be the new RAM from Ramcity. It's going bacK
     
  11. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #11
    If installed ram and suddenly starting incurring crashes, there's a really high chance its the ram. Swap it out and confirm
     
  12. sparkie7, Apr 23, 2017
    Last edited: Apr 23, 2017

    sparkie7 thread starter macrumors 68010

    sparkie7

    Joined:
    Oct 17, 2008
    #12
    Yeah. I took out the new 16GB RAM and put back the original 2x 2GB that came with the iMac - it's working normal again. So I'm returning the 2x 8GB back to ramcity.com.au
     
  13. sparkie7 thread starter macrumors 68010

    sparkie7

    Joined:
    Oct 17, 2008
    #13
    After MULTIPLE emails and hoop jumping and taking photos of the RAM modules, Ramcity is saying my iMac can't take 8GB modules – what a load of crap!

    this is what their saying..

    Based on the information available to us now after troubleshooting, the machine you have is from a run of 11,1 imacs that have a different logic board on them than the majority of the others in this range. A rough estimate puts it at around 3% of machines in this range that are affected. Unfortunately they simply will not run stable on 8GB modules even though they accept them. This is likely something to do with the chipset the boards use. However with the limited information available we cannot say for sure, only that it is a known issue.

    The machine you have simply will not be able to go past 16GB as 4GB modules are it's limit. My sincere apologies for the troubles this issue has caused.

    I'll be organising a return for you asap but before I finalise it I'd like to ask, does your machine already have 16GB installed? If not would you like to organise the appropriate 4GB modules in order to max it out? If it does already or you'd simply rather not, please let me know either way so I can organise your return.

    I'd love to do so but the machine won't accept an 8GB module. We see this issue rarely as I have mentioned. The chance of both modules being faulty in the exact same way is simply to extremely low for that to be the case and any modules I replaced it with would perform the same.

    Yes the machine is capable of 16GB I was mentioning that not disputing it. I was advising that in order to run stably your machine requires 4GB modules. 4x4GB in order to achieve 16GB.

    Coming back to my previous question with this in mind. Would you like to organise 4x4GB modules for the machine or to return the items for a refund as I will not replace the 8GB modules directly as they simply will do the same thing and you'll be back to the same issue.

    Best regards,

    (name removed)
    Upgrade Evangelist
     

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