iMac 27, the CPU temp shows 126c

[RichX]

Hi,

After upgrading to Lion OS, the fan of my iMac 27 went crazy.
I installed the iStat Pro, and it said the CPU temp was 126c (or 259f).
I closed all tasks and the CPU was at 98-99% idle.
I restarted the iMac and the problem remained the same.

I never had any problem with SL for more than 7 months before upgrading to Lion.

I bought the iMac in Jan this year.
Should I take the iMac to the Apple store?
Has anyone experienced the similar problem?

Anyway, I don't think the temp read is correct.
126c is ridiculous and the chassis is cool.

Thanks.

 

[iSayuSay]

Could be your iStat reading it wrong. Have you tried reinstalling iStat? If the back chassis (especially upper right back) is normal, you don't have to worry about anything.

If your GPU reading is 126C .. wow that's seriously hot, could be damaged soon . But you said chassis is not that hot. A good start

 

[RichX]

@iSayuSay
I can ignore the iStat reading, but my CPU fan is at 2097 rpm, and the fan noise drive me crazy. The entire chassis is very cool.

 

[macdudesir]

@iSayuSay
I can ignore the iStat reading, but my CPU fan is at 2097 rpm, and the fan noise drive me crazy. The entire chassis is very cool.

You could try an SMC reset.

http://support.apple.com/kb/ht3964 <----there's directions.

 

[tonyunreal]

I say take it in for repair immediately before you burn something, 126c is far beyond abnormal.

 

[MythicFrost]

The computer would shut itself down if it was actually that hot as it is 26c past its maximum temperature. I believe the TJ Max for the i5 2500 / i7 2600 is 100c.

I'd take it in anyway. The fans should be really quiet.