3 day old iMac 27" running way too hot? Advice please.

[sfroom]

The only temp that seems slightly higher than usual there is the HD temp. As far as I know, it's not good for the HD to operate at higher than 50 celcius.

The other components should be fine operating into the 80's-90's celcius.

It's not really comparable at all, but my current temps at idle for my MBP are as follows:

HDD: 30
CPU: 38
Airport: 43
GPU Diode: 47
GPU Heatsink: 40
Heatsink A: 42
Heatsink B: 31
Memory Controller: 39

I often see the GPU Diode going up into the high 70's, with the heatsink usually about 6 degrees lower. The CPU often goes into the low 80's under load.

 

[Bill P.]

How to test for heat/temperature?

I'd like to test my new iMac for temperature as well. Would you please share how this can be done?

Thanks!

Bill

 

[53x12]

I'd like to test my new iMac for temperature as well. Would you please share how this can be done?

Thanks!

Bill

Get iStat= http://www.islayer.com/apps/

 

[Scott6666]

Sorry, but to me, those numbers look a bit higher. I would be concerned myself. My 24" iMac is currently running at:

95F CPU
99F HDD
92F DVD
96F GPU

And I've been working on my Mac for the last two hours so those aren't cool temps.

But you weren't gaming COD4 (or something similar) like the OP, were you?

 

[gorji]

Mine iMAC 27 is also very hot.
The case acts as a heat sink which is good in the winter as the room its in does not have good heat from the central forced gas furnace and gets cool. So I put the iMAC in that room. But I may put a small quiet fan behind the case (outside case) to speed heat transfer as heat's the enemy of electronics.

 

[mindonghun]

physics

Open a refigerator.. Nice and cool
Touch the back of a refrigerator.. Very hot

 

[theSeb]

Okay, just seemed a bit strange to me, especially when somebody else felt the back of the mac and said it was almost hot enough to burn their hand.

Don't waste your time touching the back of the computer. Your temp readings are fine. The back of the iMac is designed to work as a heatsink and will get hot.

 

[Georgio]

You quote your ambient temperature as 81º, is that your actually room temperature?
I ask as the iMac will be hotter if the surrounding air is pretty hot, after all it's not an air-con unit.

SMC fan control will only work in OSX, if you're gaming in Windows than by default the Mac's temperature rocket.
What I find is that if I set the fans in OSX then boot into Windows the fans stay at whatever setting they were in OSX.
It sounds as if you need to ramp everything up to 2k/min to have a chance at keeping your Mac cool.

My old duo-core used to get pretty hot with it's plastic back so I ended up sticking a row of old processor heatsinks across the top edge of the aluminium, not elegant but it worked.

I'm sure if some enterprising soul came up with a full width heatsink that sat on the top edge with fins hanging out the back cooled by USB or solar powered fans they could make a killing.

You read it here first folks...

 

[JimMacFan]

My GPU consistenly runs at 167 F. I have a triple monitor setup. I was concerned about temps but I have applecare and if it blows then I get a replacement. 167 F is just running three monitors with email....some video and web browser. Should I be concerned?