I recently moved my US purchased iMac to Vietnam. It is a late 2010 model so 240V is OK. At least it did not blow up when I plugged it in. 
However I am a little curious about temperature of the power supply.
I am reading temps with the iStat Pro widget. Unfortunately I never paid the power supply temp much mind which probably means it was at or below the CPU temp. Now it consistently is the highest temperature shown, often 10 C or more above the CPU. It is almost always over 60 C. Right now I have power supply 2 at 64, CPU at 47, CPU heat sink at 58 and ambient at 30 as it is evening now. The CPU fan is running 1242 which is above the minimum. Of course in the daytime all these temps can get a little scarey and the fans ramp up, as I am not always running A/C at home. In the day the CPU will go to 60-65 while the power supply remains about the same.
I know these temperatures are well below maximums but I was curious if running 220/240V into the power supply instead of 110/115V makes it run hotter.
Also iStat says Power supply 2. Did I just not notice the 2 before or is that a reflection that I am on 220V?
However I am a little curious about temperature of the power supply.I am reading temps with the iStat Pro widget. Unfortunately I never paid the power supply temp much mind which probably means it was at or below the CPU temp. Now it consistently is the highest temperature shown, often 10 C or more above the CPU. It is almost always over 60 C. Right now I have power supply 2 at 64, CPU at 47, CPU heat sink at 58 and ambient at 30 as it is evening now. The CPU fan is running 1242 which is above the minimum. Of course in the daytime all these temps can get a little scarey and the fans ramp up, as I am not always running A/C at home. In the day the CPU will go to 60-65 while the power supply remains about the same.
I know these temperatures are well below maximums but I was curious if running 220/240V into the power supply instead of 110/115V makes it run hotter.
Also iStat says Power supply 2. Did I just not notice the 2 before or is that a reflection that I am on 220V?