CPU Motherboard light

[rawkiller3154]

Its weird, anytime I open a higher quality game like Elden Ring the CPU red light comes on and it lags every so often. But when I don't have any games open the light is off on the motherboard. 

[OddOod]

CPU and PSU specs?

 

[rawkiller3154]

 

I7-9700k

Rtx 3060

Prime z370-a II

Asus600b 

1tb sea gate 

250ssd Samsung 

[OddOod]

2 hours ago, rawkiller3154 said:

Asus600b 

Is that a PSU? If so, I'd guess that your mobo is alerting to not enough power. ASUS is borderline C tier PSU and it could easily be aging into the redline for powering the 3060. 

[rawkiller3154]

Gotcha so upgrading psu should be the solution?

[rawkiller3154]

just upgraded my psu to a 850w; light still showing up on it when playing high end games 

[OddOod]

Okay, so I skimmed the entire manual
https://dlcdnets.asus.com/pub/ASUS/mb/LGA1151/PRIME_Z370-A_II/E14608_PRIME_Z370-A_II_UM_WEB.pdf

and I can't find anything that indicates that the CPU LED is even allowed to light up after POST.
You're 100% sure that it's the CPU light not the power light right next to it right?
If so, I'd like to see what hwmonitor says while you're playing. It's possible that it's lighting up for thermal throttling which might start as low as 80C (I'm not super well versed in this type of thing) and another good piece of info to have would be what cooler you are running