My iMac is always hot

[BlindSoul]

Hello.

I got my iMac about four days ago. and always when I feel it it's very very hot. Even when I'm just browsing the internet. For example, Currently only Adium and Google Chrome are open and the temperatures by iStat are:
HD 49C
CPU 49C
Ambient 37C
GPU Diode 58C
Power Supply 67C

Is it fine? and if not, what can I do?
( the iMac isn't blocked on the behind of it, so it can't be the reason ).

Thank you very much!

 

[Intell]

Those temperatures are normal. iMacs feel hot because they are made from aluminum, which conducts heat very well. Its nothing to be afraid of.

 

[simsaladimbamba]

Those are perfectly acceptable temperatures, especially in a hot climate. The back is made of aluminium, thus it feels hotter, as it radiates the heat better.
You can also check Activity Monitor for CPU process, like shown below.

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Have a look at Activity Monitor (Applications / Utilities /) and select All Processes and sort by CPU to see what the culprit may be.
Also check the "System Memory" tab to see what your "Page ins:", "Page outs:" and "Swap used:" are.

image below uses sorting by CPU as an example

Further reading:

Mac OS X: Reading system memory usage in Activity Monitor
Making The Most of Activity Monitor
What Is Activity Monitor (or How to Take Your Mac's Pulse)​

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[BlindSoul]

Oh well, If you say this is normal then i'm relaxed.

Thank you very much!

 

[Spike88]

Ambient 37 C (98 F) is NOT normal.

I'd recommend an AC for you (and your iMac's room).

My iMac temps are: http://i178.photobucket.com/albums/w251/Spike99-Pictures/New iMac system/InternalTemps2010-08-30.png

.

 

[Intell]

Ambient 37 C (98 F) is NOT normal.

Its quite normal for that to be wrong. My Mini says the ambient temp is 122F, when its really 75F.

 

[simsaladimbamba]

Ambient 37 C (98 F) is NOT normal.

I'd recommend an AC for you (and your iMac's room).

My iMac temps are: http://i178.photobucket.com/albums/w251/Spike99-Pictures/New iMac system/InternalTemps2010-08-30.png

.

Israel might be a bit hotter than where you are?

 

[ctucci]

Smc fan control

I use http://www.macupdate.com/app/mac/23049/smcfancontrol

(SMC Fan control)

I have presets for all of the fans. When it first runs, it reads the current fan speed as default.

You can then preset different speeds. I have one for work, and it accelerates the fan speed by about 20%.

I have another setting that maxes out all of the fans. Makes the iMac sound like a vacuum cleaner! But it works, drops the temps in a hurry.

-=Chris=-

 

[basher]

Its quite normal for that to be wrong. My Mini says the ambient temp is 122F, when its really 75F.

Humidity might play a factor in accurate ambient temps.