Is is really CPU problem ? or it crashed on restart ?

^{[ 6891.180275] perf: interrupt took too long (3138 gt; 3128), lowering kernel.perf_event_max_sample_rate to 63500
[16372.804104] CPU1: Core temperature above threshold, cpu clock throttled (total events = 1)
[16372.804106] CPU0: Package temperature above threshold, cpu clock throttled (total events = 1)
[16372.805108] CPU0: Package temperature/speed normal
[16372.864925] CPU1: Core temperature/speed normal
[266646.523555] perf: interrupt took too long (3936 gt; 3922), lowering kernel.perf_event_max_sample_rate to 50750
[463061.284154] CPU1: Core temperature above threshold, cpu clock throttled (total events = 5501)
[463061.284155] CPU0: Package temperature above threshold, cpu clock throttled (total events = 6079)
[463061.285155] CPU0: Package temperature/speed normal
[463061.348608] CPU1: Core temperature/speed normal
[463128.105916] NVRM: GPU at PCI:0000:08:00: GPU-af74560f-25a5-8145-0cdf-79e4c8a606d8
[463128.105918] NVRM: GPU Board Serial Number:
[463128.105920] NVRM: Xid (PCI:0000:08:00): 62, 110d(7d6c) 00000000 00000000
[463132.265319] NVRM: Xid (PCI:0000:08:00): 31, Ch 00000000, engmask 00000110, intr 10000000
Rig is rebooting due to system error. It could be caused by too much overclock/undervolt.}