Question Games at 144hz keeps crashing

[LansJoachim]

Hello and sorry in advance if I'm in the wrong section for this but first my specs:

-DDR4 Ballistix Sport LT, Gris, 16 Go (2 x 8 Go), 2400 MHz, CAS 16
-Seagate BarraCuda, 1 To
-Intel Core i7-7700K (4.2 GHz)
-Asus STRIX Z270E GAMING
-EVGA GeForce GTX 1080 Ti SC Black Edition GAMING iCX, 11 Go
-EVGA SuperNOVA 650 G3, 650W
-Deepcool Gamer Storm Captain 240 EX RGB, Noir
-Intel SSD 545s Series, 256 Go, SATA III

So my problem that I've been trying to fix is the fact that when I try to run games at 144fps with a 144hz monitor, the games whichever came out recently (Squad, Post Scriptum, Mordhau, etc...) just freeze after a few minutes in game and crash immediatly after. I don't have trouble reaching the 144fps mark but it just keeps crashing and I do not know why.

I usually get around 60-66°C for the GPU and the temps for the CPU are around 60°C too.

I didn't do any OC to anything as far as I'm concerned and I reinstalled the GPU thinking it might be loose?
Truth to be told I'm kinda lost on what to do on this because I don't know what seems to cause the constant crashes.

Thanks in advance.

 

[Starcruiser]

A 650 Watt power supply is uncomfortably close to the minimum for your setup. The sc gpu series is stock overclocked. Even though the G3 is known as a good series, it may not be up to the task with a 1080ti.

 

[LansJoachim]

So that means I'd need to get a PSU with a higher wattage if I want to get a stable 144hz performance?