David Portela

Q: NVIDIA GeForce GT 130 Kernel Panics/Freezes in Lion & late Snow Leopard

I've found some other reports of these freezes scattered about the forums, but usually other people come in and post something about unrelated video cards. So this thread is specific to NVIDIA GeForce GT 130 running OS X Lion (10.7-10.7.3), to avoid confusion and cross-polination of different issues.

 

Hardware Overview:

 

  Model Name:          iMac

  Model Identifier:          iMac9,1

  Processor Name:          Intel Core 2 Duo

  Processor Speed:          3.06 GHz

  Number of Processors:          1

  Total Number of Cores:          2

  L2 Cache:          6 MB

  Memory:          8 GB

  Bus Speed:          1.07 GHz

  Boot ROM Version:          IM91.008D.B08

  SMC Version (system):          1.37f3

 

NVIDIA GeForce GT 130:

 

  Chipset Model:          NVIDIA GeForce GT 130

  Type:          GPU

  Bus:          PCIe

  PCIe Lane Width:          x16

  VRAM (Total):          512 MB

  Vendor:          NVIDIA (0x10de)

  Device ID:          0x062e

  Revision ID:          0x00a1

  ROM Revision:          3370

 

 

Since upgrading to Lion I have had many issues with crashes and kernel panics characterized by the following symptoms, listed here in detail so that people can find them when they search:

 

  • Pixellation - colored pixels appear in different areas of the screen, in seemingly random bunches.
  • Mosaics - squares appear redrawn in the wrong part of the screen. Sometimes these squares are large, other times tiny.
  • Recovery - sometimes the system recovers once it starts doing these. Other times it just keeps going until it freezes/panics.
  • Kernel Panics - I've only had the "grey screen" appear once or twice. Usually there is a complete system lockup before this can happen, and I have to reboot the system manually.

 

Some solutions/attempts to solve:

 

  • Turn off Energy Saving - This is horrible for the monitor and can lead to burn-in, but I found that many of my crashes occured when the system was trying to recover from "screen sleep". So now I run a screen saver instead, which doesn't seem to trigger it as much.
  • Screen Saver - Sometimes I can "refresh" the system by turning on the screen saver and then coming back. Other times, this doesn't work and the pixellation/mosaic remains. Sometimes I can't even initialize the screen saver at all (in which case a total freeze usually occurs right after).
  • Rebooting - seems to clear things up for a while, but inevitably, the problem resurfaces.
  • Running Windows - Not really a solution, but I have had absolutely no issues with this behavior while running Windows 7 on this same machine (under Bootcamp).
  • Downgrading to Snow Leopard - I have not attempted this, but I've read others say that their crashes went away when they did. I would like some more concrete evidence on this if anyone has it.

 

My diagnosis so far:

 

  • OS X Lion's NVIDIA driver kernel extensions (kexts) seem to be faulty with this GPU. The Windows drivers for this GPU work better on Apple's own hardware than OS X Lion's. Anectodal evidence indicates that Snow Leopard's drivers (at least up to 10.6.3 – more confirmation needed) do not display this issue. I can confirm that this never occurred in Snow Leopard until Lion was released and I upgraded to it.

 

My request for help and information:

 

  • If you are running this GPU (GeForce GT 130) and OS X Lion, please contribute to this thread offering any solutions you may have or, at the very least, listing your hardware and GPU profile.
  • If you can, post crash logs so that we can compare common issues (NVDA Resman seems to be a huge recurring kext in the crash logs, for instance).
  • Post screen shots or pictures taken of the pixellation (colored pixels) and mosaic (squares drawn in the wrong place) phenomenon, so we can build a body of evidence regarding this issue. I will continue to update this thread with the same.

 

I feel Apple has ignored these issues for far too long, and required too many people to simply purchase new computers and new GPUs. If we can build a solid body of evidence regarding this specific issue, it will be a thread that Apple Support can be referred to.

iMac, Mac OS X (10.7.3), 3.06 Ghz (Early 2009 – iMac9,1)

Posted on May 9, 2012 8:29 AM

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Q: NVIDIA GeForce GT 130 Kernel Panics/Freezes in Lion & late Snow Leopard

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  • by DrTrishy,

    DrTrishy DrTrishy Sep 18, 2013 3:21 AM in response to Joris Sewandono
    Level 1 (0 points)
    Sep 18, 2013 3:21 AM in response to Joris Sewandono

    Yes, that's what I'd like to know. This machine is becoming too unstable to use and I already lost my MBP earlier on in the year so I am really screwed! 

     

    Anyway, here is another kernel panic log ... slightly different kexts this time, but all still graphics related.  How do we get action on this?

     

     

     

    Interval Since Last Panic Report:  12678652 sec

    Panics Since Last Report:          1

    Anonymous UUID:                    81BFA3D9-9DAC-4BF0-9BD1-9F69C7C531DC

     

    Wed Sep 18 11:12:21 2013

    panic(cpu 1 caller 0x2abf6a): Kernel trap at 0x00ccff52, type 14=page fault, registers:

    CR0: 0x8001003b, CR2: 0x0000008c, CR3: 0x00100000, CR4: 0x00000660

    EAX: 0x00000001, EBX: 0x0a311000, ECX: 0x00000000, EDX: 0x00000001

    CR2: 0x0000008c, EBP: 0x5e113c08, ESI: 0x204427e8, EDI: 0x00000000

    EFL: 0x00010246, EIP: 0x00ccff52, CS:  0x00000008, DS:  0x12550010

    Error code: 0x00000002

     

    Backtrace (CPU 1), Frame : Return Address (4 potential args on stack)

    0x5e1139f8 : 0x21b837 (0x5dd7fc 0x5e113a2c 0x223ce1 0x0)

    0x5e113a48 : 0x2abf6a (0x59e3d0 0xccff52 0xe 0x59e59a)

    0x5e113b28 : 0x2a1a78 (0x5e113b40 0x5aefd876 0x5e113c08 0xccff52)

    0x5e113b38 : 0xccff52 (0xe 0x2d770048 0x10970010 0x10)

    0x5e113c08 : 0xcd01dc (0xa311000 0x71a317e8 0x204427e8 0x0)

    0x5e113c78 : 0xcd8734 (0xa311000 0xa316a00 0x5e113ca8 0x48742000)

    0x5e113c98 : 0xcb398c (0xa316a00 0xa311000 0xd0747 0x508625)

    0x5e113cb8 : 0xc8773d (0x48742000 0x0 0x5e113ce8 0x9442c20)

    0x5e113cd8 : 0x9727fc (0x48742000 0x0 0x9329c00 0x4)

    0x5e113d18 : 0x976e93 (0x9329c00 0x4 0x1 0x506769)

    0x5e113d48 : 0x98e0f9 (0x9329c00 0x4 0x1 0x506ad1)

    0x5e113db8 : 0x98e9b5 (0x9329c00 0x2 0x5e113de8 0x50674e)

    0x5e113e28 : 0x975236 (0x9329c00 0x70777273 0x2 0x226e2f)

    0x5e113e68 : 0x9753f4 (0x9329c00 0x75 0x5e113e98 0x979b2b)

    0x5e113e98 : 0x97f1e2 (0x9605200 0x75 0x161aeb00 0x5e113ed0)

    0x5e113ed8 : 0x553ec7 (0x946d6c0 0x923dc00 0x1 0x94d47a8)

    0x5e113f28 : 0x552ea6 (0x923dc00 0x2c 0x5e113f78 0x30d115)

    0x5e113f88 : 0x552eea (0x946d6c0 0x246 0x5e113fe0 0xffffffff)

    0x5e113fc8 : 0x2a179c (0x946d6c0 0x0 0x10 0x8b3cba4)

          Kernel Extensions in backtrace (with dependencies):

             com.apple.GeForce(6.3.6)@0xc85000->0xd3bfff

                dependency: com.apple.NVDAResman(6.3.6)@0x997000

                dependency: com.apple.iokit.IONDRVSupport(2.2.1)@0x98a000

                dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x951000

                dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0x968000

             com.apple.iokit.IONDRVSupport(2.2.1)@0x98a000->0x996fff

                dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0x968000

                dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x951000

             com.apple.iokit.IOGraphicsFamily(2.2.1)@0x968000->0x989fff

                dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x951000

     

    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: iMac9,1 (Mac-F2218FC8)

     

    System uptime in nanoseconds: 13259789164717

    unloaded kexts:

    com.apple.driver.AirPortBrcm43xx     423.91.27 (addr 0xf14000, size 0x1900544) - last unloaded 100014737011

    loaded kexts:

    com.sophos.kext.sav     8.0.14

    org.virtualbox.kext.VBoxNetFlt     2.1.4

    org.virtualbox.kext.VBoxUSB     2.1.4

    org.virtualbox.kext.VBoxDrv     2.1.4

    com.Cycling74.driver.Soundflower     1.5.2

    com.AmbrosiaSW.AudioSupport     3.2

    com.apple.driver.AppleHWSensor     1.9.3d0 - last loaded 24681884162

    com.apple.filesystems.autofs     2.1.0

    com.apple.driver.AGPM     100.12.31

    com.apple.driver.AppleMikeyHIDDriver     1.2.0

    com.apple.driver.AudioAUUC     1.57

    com.apple.driver.AppleHDA     2.0.5f14

    com.apple.driver.AppleMikeyDriver     2.0.5f14

    com.apple.driver.AppleUpstreamUserClient     3.5.7

    com.apple.driver.AppleMCCSControl     1.0.20

    com.apple.driver.ACPI_SMC_PlatformPlugin     4.7.0a1

    com.apple.driver.AppleIntelPenrynProfile     17

    com.apple.Dont_Steal_Mac_OS_X     7.0.0

    com.apple.driver.AudioIPCDriver     1.1.6

    com.apple.GeForce     6.3.6

    com.apple.driver.AppleLPC     1.5.1

    com.apple.driver.AppleBacklight     170.0.46

    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.AirPortBrcm43224     428.42.4

    com.apple.driver.AppleUSBHub     4.2.4

    com.apple.driver.AppleAHCIPort     2.1.7

    com.apple.nvenet     2.0.17

    com.apple.driver.AppleUSBOHCI     4.2.0

    com.apple.driver.AppleHPET     1.5

    com.apple.driver.AppleEFINVRAM     1.4.0

    com.apple.driver.AppleRTC     1.3.1

    com.apple.driver.AppleUSBEHCI     4.2.4

    com.apple.driver.AppleACPIButtons     1.3.6

    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.AppleProfileReadCounterAction     17

    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.DspFuncLib     2.0.5f14

    com.apple.driver.IOPlatformPluginFamily     4.7.0a1

    com.apple.driver.AppleSMBusController     1.0.10d0

    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.driver.AppleSMC     3.1.0d5

    com.apple.iokit.AppleProfileFamily     41

    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.driver.AppleSMBusPCI     1.0.10d0

    com.apple.nvidia.nv50hal     6.3.6

    com.apple.NVDAResman     6.3.6

    com.apple.driver.AppleBacklightExpert     1.0.1

    com.apple.iokit.IONDRVSupport     2.2.1

    com.apple.iokit.IOGraphicsFamily     2.2.1

    com.apple.driver.AppleUSBHIDMouse     162

    com.apple.driver.AppleHIDMouse     162

    com.apple.iokit.IOSCSIBlockCommandsDevice     2.6.8

    com.apple.driver.AppleUSBHIDKeyboard     141.5

    com.apple.driver.AppleHIDKeyboard     141.5

    com.apple.iokit.IOUSBMassStorageClass     2.6.7

    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.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.IO80211Family     320.1

    com.apple.iokit.IOUSBUserClient     4.2.4

    com.apple.iokit.IOAHCIFamily     2.0.6

    com.apple.iokit.IONetworkingFamily     1.10

    com.apple.driver.NVSMU     2.2.7

    com.apple.driver.AppleEFIRuntime     1.4.0

    com.apple.iokit.IOUSBFamily     4.2.4

    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

    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: iMac9,1, BootROM IM91.008D.B08, 2 processors, Intel Core 2 Duo, 3.06 GHz, 4 GB, SMC 1.37f3

    Graphics: NVIDIA GeForce GT 130, NVIDIA GeForce GT 130, PCIe, 512 MB

    Memory Module: global_name

    AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8E), Broadcom BCM43xx 1.0 (5.10.131.42.4)

    Bluetooth: Version 2.4.5f3, 2 service, 12 devices, 1 incoming serial ports

    Network Service: Ethernet, Ethernet, en0

    Network Service: AirPort, AirPort, en1

    Serial ATA Device: WDC WD1001FALS-40K1B0, 931.51 GB

    Serial ATA Device: OPTIARC DVD RW AD-5670S

    USB Device: Built-in iSight, 0x05ac  (Apple Inc.), 0x8502, 0x24400000 / 2

    USB Device: Keyboard Hub, 0x05ac  (Apple Inc.), 0x1005, 0x26400000 / 2

    USB Device: Apple Optical USB Mouse, 0x05ac  (Apple Inc.), 0x0304, 0x26430000 / 4

    USB Device: Apple Keyboard, 0x05ac  (Apple Inc.), 0x021e, 0x26420000 / 3

    USB Device: IR Receiver, 0x05ac  (Apple Inc.), 0x8242, 0x04500000 / 3

    USB Device: Generic USB Hub, 0x058f  (Alcor Micro, Corp.), 0x9254, 0x04300000 / 2

    USB Device: My Book 111A, 0x1058  (Western Digital Technologies, Inc.), 0x111a, 0x04310000 / 5

    USB Device: PTZ-930, 0x056a  (WACOM Co., Ltd.), 0x00b2, 0x04320000 / 4

    USB Device: BRCM2046 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x06100000 / 2

    USB Device: Bluetooth USB Host Controller, 0x05ac  (Apple Inc.), 0x8215, 0x06110000 / 3

  • by Scott Hannahs,

    Scott Hannahs Scott Hannahs Sep 18, 2013 4:58 AM in response to DrTrishy
    Level 1 (0 points)
    Sep 18, 2013 4:58 AM in response to DrTrishy

    Dr. Trishy,

     

    This seems very different.  Most of the complaints are for after upgrading to 10.8.  Your crash is on the old 10.6.8 system.  From your crash log.

    "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: iMac9,1 (Mac-F2218FC8)"

     

    This implies that it is not a problem with the new drivers.  My guess is that it is a heat management problem due to dust in the heat sink, loss of heat sink compound between the graphics chip and the heat sink or some other reason.

     

    This shows up more in Mac OS X 10.8.X versions since they are optimized and push more graphics onto the chip.  Increasing the fan speed with a 3rd party extension (istat menus, SMC Fan control etc.) will reduce the number of occurances but not eliminate them.

  • by David Portela,

    David Portela David Portela Sep 18, 2013 7:14 AM in response to Scott Hannahs
    Level 1 (30 points)
    Sep 18, 2013 7:14 AM in response to Scott Hannahs

    Scott, it actually seems that the driver change was in later versions of Snow Leopard (10.6) — see the title of this thread. So it could actually still be related.

  • by dolo b,

    dolo b dolo b Sep 18, 2013 3:41 PM in response to David Portela
    Level 1 (0 points)
    Sep 18, 2013 3:41 PM in response to David Portela

    Has anyone seen this YouTube video https://m.youtube.com/watch?v=kxXkuIHCz3I, it's really hard to understand the guy but it could possibly be a remedy for the 2009 iMacs with the graphics card issue.

  • by dolo b,

    dolo b dolo b Sep 18, 2013 3:54 PM in response to dolo b
    Level 1 (0 points)
    Sep 18, 2013 3:54 PM in response to dolo b

    It's a shot in the dark for sure but what I don't understand is that I can watch a movie with the Vlc player and not have a single crash, then as soon as I do anything else it crashes. Has anyone experimented with exchanging the kext files in SL?

  • by MR.MICHAEL.STILES,

    MR.MICHAEL.STILES MR.MICHAEL.STILES Sep 18, 2013 4:19 PM in response to dolo b
    Level 1 (0 points)
    Sep 18, 2013 4:19 PM in response to dolo b

    Yeah that guy is going way to fast, and his Indian accent is too strong to understand clearly.  Anyone else want to take a stab at attempting this and post a new video?

  • by MR.MICHAEL.STILES,

    MR.MICHAEL.STILES MR.MICHAEL.STILES Sep 18, 2013 4:22 PM in response to Scott Hannahs
    Level 1 (0 points)
    Sep 18, 2013 4:22 PM in response to Scott Hannahs

    Yeah I dont think it is a dust issue either.  Last December I replaced my HDD with a SSD and while it was apart I cleaned it out real well.  Made no difference.  Not to mention the issues started right after Mountain Lion install, and SMC made a difference. After a couple updates ago, my machine actually got better.  The freezes are very far apart, however, the problem is not remedied.

  • by MR.MICHAEL.STILES,

    MR.MICHAEL.STILES MR.MICHAEL.STILES Sep 18, 2013 7:06 PM in response to dolo b
    Level 1 (0 points)
    Sep 18, 2013 7:06 PM in response to dolo b

    I can't run VLC at all without it crashing.  I thought it was only MKV files, but it seems they all cause VLC to quite unexpectedly.  Not sure what is causing it.

  • by dolo b,

    dolo b dolo b Sep 18, 2013 7:25 PM in response to MR.MICHAEL.STILES
    Level 1 (0 points)
    Sep 18, 2013 7:25 PM in response to MR.MICHAEL.STILES

    Thats weird, my iTunes works fine except the online store part of it and Vlc works fine for the most part, it crashs sometimes when i minimize the window. Basically anything that uses flash crashes the system, I use aplia for homework and that crashes it. Also on my Smfan control it says temp is at 30*, then instat says its running at 100*.

     

    <Edited by Host>

  • by DrTrishy,

    DrTrishy DrTrishy Sep 19, 2013 4:31 AM in response to dolo b
    Level 1 (0 points)
    Sep 19, 2013 4:31 AM in response to dolo b

    The fix in that video is tempting.  However, it's confusing as it says Lion only, but the download folder is called 'KextUtility 2.5 + Snow Leo IO80211Family Kext 3.2'.  It also says it's for late 2009 iMacs and I think mine is early 2009.  Is there a significant difference here?  I would have thought maybe the kexts were the same. 

     

    Anyway I'm torn between trying it or not making matters worse.  If I can get an hour here and there of work done it's better than an iMac that won't boot at all because of a fix that wasn't intended for my iMac.  There's too little information about this fix for me to be happy to try it, yet as I'm sure many of you also feel, I'm getting desperate!  I've a MBP on loan which is keeping me going for work but I have to return that by the end of next week, leaving the iMac as my only machine.  It's causing me a significant cost to my productivity and I can't carry on like that.

     

    I really would love to know what it takes to get a real and well documented issue to the people in Apple who matter.  Is sustained publicity the way?

  • by DrTrishy,

    DrTrishy DrTrishy Sep 19, 2013 4:39 AM in response to dolo b
    Level 1 (0 points)
    Sep 19, 2013 4:39 AM in response to dolo b

    PS - because the symptoms can happen randomly, it's easy to think a particular player or app is causing this.  However it's much more basic than that.  If you read the article I linked to earlier, the guy compares it to getting a car whose engine stops and catastrophically fails every time you play electronic music.  He said it's like being told to stop listening to that type of music by the dealership and that will sort the problem.  Clearly the problem is much more fundamental and points to a very core issue with the engine.  His point in the article was about Flash, but it's valid - there is some weakness in the core OS that manifests itself through any number of apps at the higher level.  So the problem isn't iTunes, VLC, Flash, your browser, or your video editing software.  The software that may cause the kernel panic is just exposing the more fundamental issue because at that time it is using graphics in an intensive way.

     

    (end of lecture!) 

  • by MR.MICHAEL.STILES,

    MR.MICHAEL.STILES MR.MICHAEL.STILES Sep 19, 2013 7:29 AM in response to DrTrishy
    Level 1 (0 points)
    Sep 19, 2013 7:29 AM in response to DrTrishy

    Not to mention, if the fix was that easy, dont you think that Apple would have remedied it by now just to shut us up.  Whatever impact this has on Apple sales, a simple fix would be better than the potential loss of gross income.  I think the issue is a little more in depth than that.

  • by Mr Rudloff,

    Mr Rudloff Mr Rudloff Sep 24, 2013 11:46 AM in response to David Portela
    Level 1 (0 points)
    Sep 24, 2013 11:46 AM in response to David Portela

    Same exact issue here. Have been waiting for a fix from Apple support forever.

  • by hardtofin,

    hardtofin hardtofin Oct 11, 2013 1:05 AM in response to Mr Rudloff
    Level 1 (9 points)
    Mac OS X
    Oct 11, 2013 1:05 AM in response to Mr Rudloff

    I have the same issue here with an nvidia gt120.

     

    Anyone have anymore update on this as my mac is close to unusable.

  • by Zahori,

    Zahori Zahori Oct 11, 2013 4:35 AM in response to hardtofin
    Level 1 (0 points)
    Oct 11, 2013 4:35 AM in response to hardtofin

    Hi hardtofin, I also have a nvidia gt120 and by using SMC fan software and setting ODD fan to about 2500 RPMs I can more and less use the computer, until someone in Apple decide to fix this **** issue at some point...BTW, that fan tweak could not be enough for you depending on the use you give to your iMac. Hope it helps anyway...

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