MBAir2,1 NVidia 9400M overheats, solution?

Hi,
I have a MacBookAir2,1 (late 2008) with the NVidia 9400M graphics chip.
Obviously, the computer is no longer under warranty.
Twice now, the computer has gone defunct due to the NVidia 9400M graphics chip, necessitating a solder reflow procedure applied to the 9400M done by myself in order to ge tthe thing working again.
I have installed temperature monitor app, and have frequently seen the NorthBridge chip (is this the 9400M) run in excess of 70 degrees C.  The first time it happened, it was while watching a video using the hardware accellerated version of Adobe flash, but after I repaired the laptop the first time, I did not re-install Flash, and in this case, it happened while running little else other than Safari.
So, I've go tthe computer running again, but I'm needing suggestions of things I can do to prevent it happening again in the future.
(1)  I installed SMCfancontrol and increased the minium fan speed, but I'm not sure this will solve the probem, as it doesn't appear to increase the fan speed when the computer runs hot; also, it seems to only monitor the main Intel processor and not the GPU.
(2)  I read somewhere that some people with older MacBookPros containint the 9400M had overheating issues that occurred with the upgrade to 64 bit Safari, and which seemed to improve by moving back to 32 bit Safari.  Can I get 32 bit Safari back on my computer while still running 10.7.x?  I guess I could use another browser then...
(3)  Is there anyway to decrease the voltage applied to the GPU or to "underclock" the GPU without making hardware changes?  I know there are some utilities that will do this for Windows.  Also, there is a kernel extension called "voodoopower.kext" that can be used with some hackintoshes to change these settings, but I have no idea how or even if this can be used with an authentic OS X system.  Is there another way to do this on an authentic mac?  I think this would be a better way to handle the problem than to crank up the fan using SMCfancontrol, as I heard this may cause the fan to eventually die if I run it too much.
I'm not too concerned about performance for this laptop, as I use it mostly as a file server and iTunes / Airplay server nowadays, but still, I'd like it to *work*...

Never ever use the .run file from nvidia.com directly, install the driver from the repos instead.
https://www.archlinux.org/packages/extr … dia-304xx/

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    [  1166.068] Initializing built-in extension BIG-REQUESTS
    [  1166.068] Initializing built-in extension SYNC
    [  1166.068] Initializing built-in extension XKEYBOARD
    [  1166.068] Initializing built-in extension XC-MISC
    [  1166.068] Initializing built-in extension SECURITY
    [  1166.068] Initializing built-in extension XINERAMA
    [  1166.068] Initializing built-in extension XFIXES
    [  1166.068] Initializing built-in extension RENDER
    [  1166.068] Initializing built-in extension RANDR
    [  1166.068] Initializing built-in extension COMPOSITE
    [  1166.068] Initializing built-in extension DAMAGE
    [  1166.068] Initializing built-in extension MIT-SCREEN-SAVER
    [  1166.068] Initializing built-in extension DOUBLE-BUFFER
    [  1166.068] Initializing built-in extension RECORD
    [  1166.068] Initializing built-in extension DPMS
    [  1166.068] Initializing built-in extension X-Resource
    [  1166.068] Initializing built-in extension XVideo
    [  1166.068] Initializing built-in extension XVideo-MotionCompensation
    [  1166.068] Initializing built-in extension XFree86-VidModeExtension
    [  1166.068] Initializing built-in extension XFree86-DGA
    [  1166.068] Initializing built-in extension XFree86-DRI
    [  1166.068] Initializing built-in extension DRI2
    [  1166.068] (II) LoadModule: "glx"
    [  1166.068] (II) Loading /usr/lib/nvidia/xorg/modules/extensions/libglx.so
    [  1166.078] (II) Module glx: vendor="NVIDIA Corporation"
    [  1166.078]     compiled for 4.0.2, module version = 1.0.0
    [  1166.078]     Module class: X.Org Server Extension
    [  1166.078] (II) NVIDIA GLX Module  325.15  Wed Jul 31 18:12:00 PDT 2013
    [  1166.078] Loading extension GLX
    [  1166.078] (II) LoadModule: "nvidia"
    [  1166.078] (II) Loading /usr/lib/xorg/modules/drivers/nvidia_drv.so
    [  1166.078] (II) Module nvidia: vendor="NVIDIA Corporation"
    [  1166.078]     compiled for 4.0.2, module version = 1.0.0
    [  1166.078]     Module class: X.Org Video Driver
    [  1166.078] (II) LoadModule: "mouse"
    [  1166.078] (II) Loading /usr/lib/xorg/modules/input/mouse_drv.so
    [  1166.078] (II) Module mouse: vendor="X.Org Foundation"
    [  1166.078]     compiled for 1.14.0, module version = 1.9.0
    [  1166.078]     Module class: X.Org XInput Driver
    [  1166.078]     ABI class: X.Org XInput driver, version 19.1
    [  1166.078] (II) LoadModule: "kbd"
    [  1166.078] (WW) Warning, couldn't open module kbd
    [  1166.078] (II) UnloadModule: "kbd"
    [  1166.078] (II) Unloading kbd
    [  1166.078] (EE) Failed to load module "kbd" (module does not exist, 0)
    [  1166.078] (II) NVIDIA dlloader X Driver  325.15  Wed Jul 31 17:50:57 PDT 2013
    [  1166.078] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
    [  1166.078] (--) using VT number 7
    [  1166.078] (EE) No devices detected.
    [  1166.078] (EE)
    Fatal server error:
    [  1166.078] (EE) no screens found(EE)
    [  1166.079] (EE)
    Please consult the The X.Org Foundation support
         at http://wiki.x.org
    for help.
    [  1166.079] (EE) Please also check the log file at "/var/log/Xorg.8.log" for additional information.
    [  1166.079] (EE)
    bumblebee.conf (I didnt change anything here)
    # Configuration file for Bumblebee. Values should **not** be put between quotes
    ## Server options. Any change made in this section will need a server restart
    # to take effect.
    [bumblebeed]
    # The secondary Xorg server DISPLAY number
    VirtualDisplay=:8
    # Should the unused Xorg server be kept running? Set this to true if waiting
    # for X to be ready is too long and don't need power management at all.
    KeepUnusedXServer=false
    # The name of the Bumbleblee server group name (GID name)
    ServerGroup=bumblebee
    # Card power state at exit. Set to false if the card shoud be ON when Bumblebee
    # server exits.
    TurnCardOffAtExit=false
    # The default behavior of '-f' option on optirun. If set to "true", '-f' will
    # be ignored.
    NoEcoModeOverride=false
    # The Driver used by Bumblebee server. If this value is not set (or empty),
    # auto-detection is performed. The available drivers are nvidia and nouveau
    # (See also the driver-specific sections below)
    Driver=
    # Directory with a dummy config file to pass as a -configdir to secondary X
    XorgConfDir=/etc/bumblebee/xorg.conf.d
    ## Client options. Will take effect on the next optirun executed.
    [optirun]
    # Acceleration/ rendering bridge, possible values are auto, virtualgl and
    # primus.
    Bridge=auto
    # The method used for VirtualGL to transport frames between X servers.
    # Possible values are proxy, jpeg, rgb, xv and yuv.
    VGLTransport=proxy
    # List of paths which are searched for the primus libGL.so.1 when using
    # the primus bridge
    PrimusLibraryPath=/usr/lib/primus:/usr/lib32/primus
    # Should the program run under optirun even if Bumblebee server or nvidia card
    # is not available?
    AllowFallbackToIGC=false
    # Driver-specific settings are grouped under [driver-NAME]. The sections are
    # parsed if the Driver setting in [bumblebeed] is set to NAME (or if auto-
    # detection resolves to NAME).
    # PMMethod: method to use for saving power by disabling the nvidia card, valid
    # values are: auto - automatically detect which PM method to use
    #         bbswitch - new in BB 3, recommended if available
    #       switcheroo - vga_switcheroo method, use at your own risk
    #             none - disable PM completely
    # https://github.com/Bumblebee-Project/Bu … PM-methods
    ## Section with nvidia driver specific options, only parsed if Driver=nvidia
    [driver-nvidia]
    # Module name to load, defaults to Driver if empty or unset
    KernelDriver=nvidia
    PMMethod=auto
    # colon-separated path to the nvidia libraries
    LibraryPath=/usr/lib/nvidia:/usr/lib32/nvidia
    # comma-separated path of the directory containing nvidia_drv.so and the
    # default Xorg modules path
    XorgModulePath=/usr/lib/nvidia/xorg/,/usr/lib/xorg/modules
    XorgConfFile=/etc/bumblebee/xorg.conf.nvidia
    ## Section with nouveau driver specific options, only parsed if Driver=nouveau
    [driver-nouveau]
    KernelDriver=nouveau
    PMMethod=auto
    XorgConfFile=/etc/bumblebee/xorg.conf.nouveau
    xorg.conf.nvidia (I placed my gpu device address in Device Section
    Section "ServerLayout"
        Identifier  "Layout0"
        Option      "AutoAddDevices" "false"
        Option      "AutoAddGPU" "false"
    EndSection
    Section "Device"
        Identifier  "DiscreteNvidia"
        Driver      "nvidia"
        VendorName  "NVIDIA Corporation"
    #   If the X server does not automatically detect your VGA device,
    #   you can manually set it here.
    #   To get the BusID prop, run `lspci | egrep 'VGA|3D'` and input the data
    #   as you see in the commented example.
    #   This Setting may be needed in some platforms with more than one
    #   nvidia card, which may confuse the proprietary driver (e.g.,
    #   trying to take ownership of the wrong device). Also needed on Ubuntu 13.04.
         BusID "PCI:01:00.0"
    #   Setting ProbeAllGpus to false prevents the new proprietary driver
    #   instance spawned to try to control the integrated graphics card,
    #   which is already being managed outside bumblebee.
    #   This option doesn't hurt and it is required on platforms running
    #   more than one nvidia graphics card with the proprietary driver.
    #   (E.g. Macbook Pro pre-2010 with nVidia 9400M + 9600M GT).
    #   If this option is not set, the new Xorg may blacken the screen and
    #   render it unusable (unless you have some way to run killall Xorg).
        Option "ProbeAllGpus" "false"
        Option "NoLogo" "true"
        Option "UseEDID" "false"
        Option "UseDisplayDevice" "none"
    EndSection

    Your issue seems to be similar to what I had to face with the Razer Blade 14" (similar hardware as well).
    Goto: https://bbs.archlinux.org/viewtopic.php?id=173356 and see the instructions to get graphics to work, see if it applies (summarized: run linux-ck and set rcutree.rcu_idle_gp_delay=2 in the kernel parameters).
    I haven't tried undoing this in more recent updates because I haven't had the time to mess with it---it is possible that it has been fixed, although the thread following my and possibly your issue at nvidia doesn't give any indication of that:
    https://devtalk.nvidia.com/default/topi … iver-crash

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