on 2013-09-01 5:47 Steve Cottrell wrote
I'm leaning to a GPU hardward glitch, maybe?
i don't know of a common such glitch with that model, but my first Intel Mac, a 2.17GHz Core 2 Duo MacBook Pro, died a slow death from GPU troubles; apparently there are bad solder joints that are stressed by thermal expansion; i farmed the machine out to server duty, and avoided use of OpenGL, and that extended its life for a couple of years but eventually the condition was fatal
in your case the problem doesn't sound heat-related, unless it doesn't work well when cool …
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