PC freezes/crashes randomly while playing

Im having issues with random crashes/freezes of my entire system while playing veilguard.

the game runs smooth at 60fps on my system and all of a sudden my entire PC will freeze up and I have manually reset it using the button on my case. When it happens, the screen/image will stay (so no black screen or bluescreen or whatever) and all my input devices wont work so all I can do is reset.

I though maybe its a heat issue so I tried running the game at 1080p instead of 1440p or 4k, but it still happens all the same. While running at 1080p my GPU utilization was only around 50-60%, power draw also only around 100w. My fans where rather quite too. 

So I thought maybe its the CPU overheating, so I did a stress test on my CPU to see how hot it gets - it stayed around 65C and system remained stable.

Also, the crashes also happened after alt-tabbing out of the game and re-entering it, so the system was not stressed at that point.

I can play other games fine like Star Wars Outlaws (which makes my fans spin up audibly, Veilguard does not) so I dont think its a overheating issue. Using the most up to date drivers.

My specs are:

intel i9900k

rtx 4070 TI super 16gb

32gb ram

SSD

playing the game on a mix of high/ultra with RT ON, at 60fps capped. Crashes occur even at 1080p.

Also I have DLSS disabled because I wanted to eleminate that being an issue.