so I shouldn't be worried about this? everything is ok?
Correct. However, I am with you that I don't personally like to see my hardware go past 80C even though it's not hot enough that you need to worry.
If you're unimpressed with current cooling performance, the following information may help to put your mind at ease. Most manufacturers make their cards to run at the slowest possible fan speed to keep quiet. If you download MSI Afterburner, you will have direct control over the fans and will be able to use an on screen graph to relate fan speed to temperature (known as a fan curve). You can use this to make the fan run faster at a given temperature to keep it cooler at the expense of the fan being slightly louder.
1) That GPU is rated to go up to 94C.
2) The GTX 1060 doesn't make enough heat to need a second fan.
Temps are fine.
As for 1 fan vs 2 fans, this comes down to how the new GTX 10 series is designed. The chips don't really need extra voltage to reach higher clocks like many older chips did. Note that increasing core clock does not significantly increase heat output. Increasing voltage increases heat output.
so I shouldn't be worried about this? everything is ok?
Correct. However, I am with you that I don't personally like to see my hardware go past 80C even though it's not hot enough that you need to worry.
If you're unimpressed with current cooling performance, the following information may help to put your mind at ease. Most manufacturers make their cards to run at the slowest possible fan speed to keep quiet. If you download MSI Afterburner, you will have direct control over the fans and will be able to use an on screen graph to relate fan speed to temperature (known as a fan curve). You can use this to make the fan run faster at a given temperature to keep it cooler at the expense of the fan being slightly louder.