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Can 4850 iMac owners help find the cause of the freezing? Is it WiFi?

Something else to consider: I booted into the hardware test (hold down "D" while booting), and the hardware tab incorrectly reports my CPU frequency as 3.60 GHz. From within OS X, "About this Mac" show 3.06 GHz.

I wonder what other people with the problem are seeing...
 
jtourville said:
Something else to consider: I booted into the hardware test (hold down "D" while booting), and the hardware tab incorrectly reports my CPU frequency as 3.60 GHz. From within OS X, "About this Mac" show 3.06 GHz.
Click to expand...

I see the same thing with my freezing ATI iMac.
 
jtourville said:
Something else to consider: I booted into the hardware test (hold down "D" while booting), and the hardware tab incorrectly reports my CPU frequency as 3.60 GHz. From within OS X, "About this Mac" show 3.06 GHz.

I wonder what other people with the problem are seeing...
Click to expand...

iMac4850User said:
I see the same thing with my freezing ATI iMac.
Click to expand...

This is a very important find. If this reading is indeed correct and the processor is running at 600Mhz over its rating (or even possibly Apple has gotten a batch of CPU's clocked at 3.6Ghz but has the cooling system setup for a 3.06Ghz processor) then this would explain everything.

Can anyone run CPU-Z in Windows and get a confirmation of this Processor frequency?
 
Animalk said:
This is a very important find. If this reading is indeed correct and the processor is running at 600Mhz over its rating (or even possibly Apple has gotten a batch of CPU's clocked at 3.6Ghz but has the cooling system setup for a 3.06Ghz processor) then this would explain everything.

Can anyone run CPU-Z in Windows and get a confirmation of this Processor frequency?
Click to expand...

Only thing is that there have also been reports of freezing 2.93GHz iMacs too. Not saying that there isn't the possibility of their machines being listed wrong too.
 
djc6 said:
This is a popular website to decode Apple serial numbers:

http://www.chipmunk.nl/klantenservice/applemodel.html

It will tell you the country of origin based on the serial, and also the week of manufacture (perhaps something else worth collecting).
Click to expand...

Very good, I have updated the original post to reflect all these various tests. Hopefully once the replies start coming in we will have useful data.
 
3.60? Wow, I don't know if mine said that, but that's plain hilarious. That's a forgivable human error.... probably one of the most hilarious in Apple Computer history.......... assuming it's the cause of the freezes.
 
Sermon said:
I used the same app and I get a frequency of 3060 MHz as well (with no freezing issues).
Click to expand...

Could you please do the steps in my newly edited first post? I'm especially interested in seeing what clock speed you get from the Apple Hardware Test. It is a fluke with all 3.06GHz iMacs or only with the failing ones? Thanks! :D
 
avihappy said:
Could you please do the steps in my newly edited first post? I'm especially interested in seeing what clock speed you get from the Apple Hardware Test. It is a fluke with all 3.06GHz iMacs or only with the failing ones? Thanks! :D
Click to expand...

Will do - will let you know the result later.
 
avihappy said:
Could you please do the steps in my newly edited first post? I'm especially interested in seeing what clock speed you get from the Apple Hardware Test. It is a fluke with all 3.06GHz iMacs or only with the failing ones? Thanks! :D
Click to expand...

OK, did the hardware test and the clock speed says 3.60GHz. Sorry to disappoint you here.
 
Sermon said:
OK, did the hardware test and the clock speed says 3.60GHz. Sorry to disappoint you here.
Click to expand...

Darn, doesn't seem like a factor then. Thanks anyway. I still think that we could do the factory+production week test though. See if there may be a correlation there.
 
avihappy said:
Darn, doesn't seem like a factor then. Thanks anyway. I still think that we could do the factory+production week test though. See if there may be a correlation there.
Click to expand...


Crashing iMac:
Factory: W8 (Shanghai China)

Production year: 2009
Production week: 15 (April)
Production number: 2016 (within this week)
 
avihappy said:
Darn, doesn't seem like a factor then. Thanks anyway. I still think that we could do the factory+production week test though. See if there may be a correlation there.
Click to expand...

OK, did that test as well - here's the info:

Factory: W8 (Shanghai China)
Production year: 2009
Production week: 15 (April)
Production number: 445 (within this week)
 
Hmm, the only thing that is different between your broken one and the working one is the production number (but that will be different every time). These iMacs were even made in the same factory. Well, I'm out of ideas. I want to be able to at least find a quick test you can do to find out if you are affected, but I have no more factors I can think of...

Back with the iMacs they released in 2007, there was a simple terminal command you could run to quickly and easily identify if you were affected, but so far we have nothing on this front. Any Mac gurus have any ideas?

BTW Headliner, can you tell me the exact spec of the iMac? All the BTO options you chose?
 
avihappy said:
Hmm, the only thing that is different between your broken one and the working one is the production number (but that will be different every time). These iMacs were even made in the same factory. Well, I'm out of ideas. I want to be able to at least find a quick test you can do to find out if you are affected, but I have no more factors I can think of...

Back with the iMacs they released in 2007, there was a simple terminal command you could run to quickly and easily identify if you were affected, but so far we have nothing on this front. Any Mac gurus have any ideas?

BTW Headliner, can you tell me the exact spec of the iMac? All the BTO options you chose?
Click to expand...

Sure its a 3.06Ghz, 4GB RAM, 1TB HD, Wireless mouse and keyboard, build 9G3610 of OS X....
 
Headliner said:
Sure its a 3.06Ghz, 4GB RAM, 1TB HD, Wireless mouse and keyboard, build 9G3610 of OS X....
Click to expand...

This is likely reaching, but maybe the difference is the HDD? You have 1TB, while Sermon has 640GB. I really can't prove or disprove this thought because people really don't say anything about their full configuration when they post that they have this problem...
 
avihappy said:
This is likely reaching, but maybe the difference is the HDD? You have 1TB, while Sermon has 640GB. I really can't prove or disprove this thought because people really don't say anything about their full configuration when they post that they have this problem...
Click to expand...

sounds far fetched... but then who knows? this just keeps getting weirder lol. Can we debunk this one right away? Know anyone with a working 1TB machine?
 
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