Hi Krzemin, a low-spec related crash seems unlikely to me (btw congrats on ur impressive rig), on paper your PSU should be plenty capable of pushing this high-end build, cpu+GPU combined power consumption should be around 530W (253+277), full system will probably reach 650-700w (I take it the double "RTX 4070Ti"s on ur list is a typo, however if you do have a SLI setup it may infact be too much for that psu to handle when you start pushing the system to the limit).
If you already made sure the components' temperatures look good, I suggest you move on to checking the system's log, here's an [link|https://www.partitionwizard.com/partitionmagic/windows-10-crash-log.html|how-to|new_window=true], just open Event viewer and browse 'Windows logs' > 'System' and look out for recent error reports. This way we can try to figure out if the crash is due to software bugs, bad drivers, hardware failures etc.