I have ran Furmark for about 2-3 minutes without problems this time.
About 5 seconds after I openned the CPU Stability test 6.0 and started it my computer frozed.

Here are all the informations I had available.

GPU (Before CPU test):
 - Temp: ~80C
 - Usage: 100%
 - 12V: ~11.88V
 - VDDC: 0.962V
 - VDDC Current: ~75-80A
 - VDDC Power: ~50-60W

GPU (When the CPU test started):
 - Temp: ~72C
 - Usage: ~30-60%
 - 12V: ~11.97V
 - VDDC: ~0.936V
 - VDDC Current: ~29-60A
 - VDDC Power: ~25-40W

Then it freezed.