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100% CPU Usage on desktop

MSTNG
By MSTNG
in Troubleshooting
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Hello, So I got a new CPU about a month ago, since then it has gone to 100% for no apparent reason 4 times. Temps seem fine max (70°). It only does this for 5-10 min max then returns to normal <5% usage. Also PC is very laggy when this is happening. Haven't really tried anything to troubleshoot. Any suggestions are appreciated.

PC Specs:

i9 9900k @4.5ghz

RTX 2060

16GB DDR4 (2400MHz)

650Watt PSU 

Dark rock 4 Cooler

Screen shot + video of it fixing.

45f8a77b054bffdbe0cdb17020a43b40.jpg

 

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https://linustechtips.com/topic/1201411-100-cpu-usage-on-desktop/
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What make and model of PSU do you have? Is the 9900k overclocked?

Main Desktop: CPU - i9-14900k | Mobo - Gigabyte Z790 Aorus Elite AX | GPU - PNY Gaming OC RTX 5080 16GB | RAM - Corsair Vengeance Pro RGB 64GB 6400mhz | AIO - Arctic Liquid Freezer III 360mm | PSU - Corsair RM1000X | Case - Hyte Y40 - White | Storage - Samsung 980 Pro 1TB Nvme /  Sabrent Rocket 4 Plus 4TB Nvme / Samsung 970 EVO Plus 2TB Nvme / Samsung 870 EVO 4TB SSD / Samsung 870 QVO 2TB SSD/ Samsung 860 EVO 500GB SSD|

 

TV Streaming PC: Intel Nuc CPU - i7 13th Gen | RAM - 16GB DDR4 3200mhz | Storage - Crucial P3 Plus 1TB Nvme |

 

Phone: Samsung Galaxy S26 Ultra - Black 256GB |

 

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