OC Newbie needs help.

[Edness]

Geed evening. After reading shit ton of posts about oc i feel a bit more coocky. 

I have overclocked my Ryzen 7 2700 with the stock cooler.

I reached 3.675 mhz

On 1.13125 V

Stressed it with CineBenchR20 with 3 runs one after another i am happy with the score boost.

Now after reading in the internet i find out that anything bellow 75 C is sweet spot.

I managed to get on the 3 run of cinebench 74C

My questions are. 

Does it sound stable after 3 runs of cinebench?

On all 3 runs results were. 1-69C 2-72C 3-74C?

Is it save reaching such C under 100% load?

Motherboard Asrok X370M PRO 4.

GPU Aorus 1080TI.

Ram 2x8gb hyperx fury 2933

Pure OC for gaming satisfaction.

 

Thanks in advance!