Speed fan has to be compatible with your motherboard and stuff moreless to pick up that sort of information.
If your fans werent working your CPU would over heat very quickly(most cases). Also you'd hear a strange beeping noise as your PC would be telling you my fans arent working help.
Also fan1 and fan2 could and properly are system fans that not everyone's PC has
So don't worry about it.
Also if your not having trouble with your PC, you have no need to check temperatures. These things make you paranoid.
50-60 unload is normal for AMD CPU's , i been using Intel all the time.
I can assure you mine set constantly at 50-60oC. unload it use to hit 70-80.
But then again intel use to be power consumers generated much more heat.(at least presscott cores did
)
alby - If you don't/haven't had any issue's just forget about your temperature. It makes you think therres something wrong when theres not.
As people with different setups will tell you different temperatures for CPU's.