What cpu do you have? If it’s intel something like 11990k, overclocked…well yeah it could go up over 200W and 300W under extreme load but not in gaming, gpu another 400W and of course as flight simmer a lot of peripherals which do not consume much but when you add 5-10W then another 10W for 8 peripherals then 5 hdd’s for xplane’s ortho lol Yeah that’s plausible.
Always stress test your PC if you’re having ctd’s. Run benchmarks, some light ones like 3D mark for general testing, then prime95 to load up ram and cpu to the max, furmark for gpu.