Undervolt 5600x somehow fix game crashing for me

[soluet]

basically i got crash at every boss especially on Forest (random crash) and PC force shutdown sometimes bluescreen too, so I tried every method (DLSS Swapper, FG off, setting to medium low) and even bring my desk fan to cool my CPU off.
none of it help (i got around 83-90c when in-game)
so I tried undervolt my 5600x to 4.0Ghz and wow in-game my CPU go from average 85c to around 65c
i even setting ultra with ray tracing on 2k and got stable gameplay no crash at all
I CAN FINALLY PLAY THIS GAME ;-;

my spec:
Ryzen 5 5600x with stock cooling fan
RTX 4070 Super

[Khergit Horse Archer]

uhh undervolt doesnt make your cpu more stable, its actually the reverse but you also mentioned 4.0 ghz, which is an underclock which will make it more stable, so its more likely your cpu has somehow degraded and wasnt stable at base clocks.