I found a solution for the problem in this forum (Thanks to Stephan).
It wasn't tricky, but if you want the short story:
- Download the changed kernel module
- Extract the archive and copy the amdtemp.ko file to your box, to /root
- Execute following commands:
cp /root/amdtemp.ko /boot/kernel/
After this steps, you'll see the current temperature in the Dashboard view.