Now i have searched the web a few months about my graphic performance problem on my 3,1ghz 2011 iMac.. The 6970 1gb card has absolute no power in OSX.. but works perfect in windows..
I have a fan speed problem caused by the ambient temperature sensor which is not present in the list of sensors in all temp sensor programs..
I understand that this missing temp information is causing the SMC to tell OSX to slow everything down.. Fair enough.. Everything works in windows so i guess windows doesn't get the info to slow down .. But i hate windows..
I have tried change the ambient temp sensor.. but still no success.. If i reset the SMC the ambient temp comes up with 128c reading.. i guess that is a "faulty mode" value..
Every thing points at the logic board.. Witch is very expensive.. (buy another iMac 2. hand instead!!) Yeah.. But I'm a fighter.. Everything else on the computer works fine..
Would it be possible somehow to cheat the SMC -> OSX info transfer of temp values.. or faulty mode.. ?
And can someone confirm my problem by trying to disconnect the ambient temp sensor and describe their iMacs behavior ?
I keep my fans down with "macs Fan Control".. works perfectly.. If i close the program, CPU and Optical fan run max speed.
But i have still no graphic performance.. (games runs very bad even in very low settings) and iTunes album scrolling is crappy
Any ideas?
/Kristian, Denmark
I have a fan speed problem caused by the ambient temperature sensor which is not present in the list of sensors in all temp sensor programs..
I understand that this missing temp information is causing the SMC to tell OSX to slow everything down.. Fair enough.. Everything works in windows so i guess windows doesn't get the info to slow down .. But i hate windows..
I have tried change the ambient temp sensor.. but still no success.. If i reset the SMC the ambient temp comes up with 128c reading.. i guess that is a "faulty mode" value..
Every thing points at the logic board.. Witch is very expensive.. (buy another iMac 2. hand instead!!) Yeah.. But I'm a fighter.. Everything else on the computer works fine..
Would it be possible somehow to cheat the SMC -> OSX info transfer of temp values.. or faulty mode.. ?
And can someone confirm my problem by trying to disconnect the ambient temp sensor and describe their iMacs behavior ?
I keep my fans down with "macs Fan Control".. works perfectly.. If i close the program, CPU and Optical fan run max speed.
But i have still no graphic performance.. (games runs very bad even in very low settings) and iTunes album scrolling is crappy
Any ideas?
/Kristian, Denmark
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