SMART Utility vs smcFanControl - HD temp discrepancy

[djc6]

I replaced the HD in my iMac, the Western Digital Caviar Blue it came with failed. Anyways, I noticed that SMART Utility reports the drive as being 51C and smcFanControl says 41C - which should I trust? Thats a pretty big discrepancy. Makes me wonder if I put the HD sensor back on right.

 

[djc6]

Ran the fan at max for a few minutes... now smcfancontrol says 40C, SMART Utility and SMARTreporter say 44C - so there is still a discrepancy, but its less of one.

 

[MacHamster68]

and that is normal , because smc is using the heat sensor attached to the outside of the harddrive , and smart is using a sensor inside the harddrive so the smart reading will always be higher...
i think the 09 10 and 2011 Macs use internal smart sensor

 

[djc6]

It just bothers me that the fan control is being based on the sensor with the lower reading. Unless 50C is normal for an all-in-one computer like the iMac. 50C seems average based on the submitted user info on this site:


http://www.intelmactemp.com/

 

[mjsmke]

50c is fine. Most modern CPU's can run at well over 80c so dont worry.

 

[MacHamster68]

as long as the hdd stays under 60 degree most of its time its fine, and yes All In One computers run a bit warmer generally in comparison with desktops which are easier to cool as enough space for big efficient fans inside