Macbook 3,1 GPU Overheat? Crawls /w Artifacts

Discussion in 'MacBook Pro' started by Fimeg, Nov 16, 2013.

  1. Fimeg macrumors regular

    Jun 12, 2013
    I have a Macbook 3,1 with Mavericks on it. It's the 2.4/2.2GHz model with a NVIDIA GeForce 8600M GT 128 MB graphics card in it. I'm currently using Mac Fan Control to adjust the Fan speed depending on the heat of the GPU diode. When the diode gets above 60c, the computer will either, put up artifacts on the screen, e.g., hovering box around the mouse, or big green shades (they look like a cracked glass screen) over the entire screen, OR the computer will completely lock up. On occasion, when the artifacts appear, (I was using SMC Fan control at the time) I would crank the fan up to maximum, and could regain control of the computer.

    I've completely blown out the fans, and under the motherboard as best as I could, but have ordered some new thermal paste for the heat sync and CPU/GPU equipment. But.... does anyone have another suggestion? Does this fit the qualification for a motherboard reflow? And, does anyone reflow the motherboards here in Oregon, or should I try the "bake it in the over at 250" approach?

    I believe I have a hardware problem, but would love to have you lie to me about that, ha. Really though, if you have any suggestions that'd be great.

  2. Doward macrumors 6502a

    Feb 21, 2013
    Yes, you need a reflow. Thermal compound / heatsink work alone will not fix your issues, sorry man.

    Also, 250F is not hot enough to reflow. Need ~385F to hit the eutectic point of most solder.
  3. AnonMac50 macrumors 65816

    Mar 24, 2010
    Well, the 8600M GT is infamous for dying. The one in my Early 2008 did that. At the time Apple would replace it for free with a version that shouldn't die. Being a 2007 model and this over 5 years old, I don't think they'll fix it any more. If they did, it will cost about as much as a new computer anyway.

    Good luck
  4. Fimeg thread starter macrumors regular

    Jun 12, 2013
    Just though I'd reply that I followed a guide online about baking the macbook. I disassembled it, put it in the oven at 375 degrees for ~8 minutes, and then reassembled it. I've yet to experience artifacts, but the fans are turning much faster now. Before they'd hardly spin (Roughly 2000RPM) and I had to use a fan control to compensate.

    I'll post back more later if I experience any changes.

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