Question Why has my PC started to freeze and crash?

Jan 1, 2021
Hey Im new to the PC world and I built this custom pc about 7 months ago (specs below) since building it has been great. No issues, everything running perfect. I was playing rust and tarkov a lot and i never had any issues then all of a sudden one day my PC started freezing and crashing while playing certain games. Other games like Valorant, Ark, Pubg, etc. work just fine. And sometimes i can get on Rust, Tarkov, or Green hell and play for over and hour then it will crash and sometimes it crashes after 5 mins. Ive replaced gpu with a new one and replaced the psu with a new one. The temps seem to be fine im just not sure what to do at this point any advice will be considered and appreciated. Thanks in advance.

ASUS Z390-PLUS TUF Gaming Wifi

PowerSpec 750w (replaced for CORSAIR RM750)

HyperX FURY RGB (16GB (2 x 8Gb))

Samsung 860 EVO 1TB SSD

CORSAIR Hydro H115i PRO 280MM

INTEL i5-9600k 3.7GHz Six-Core

ASUS GeForce RTX 2060 ROG Strix Overclocked Triple-Fan 6GB