Question New build extremely choppy with lag

Aug 30, 2020
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Having a problem with a pc i just built it’s my first one but had people who have built multiple help me put it together and set everything up.
I’m having crazy frame drops and really bad lag no game is playable at all On the menu on call of duty it will be at 130ish FPS and then when everything loads I will drop to 5 to 15 and then it will go up to 30 to 40 and stay there nothing changes after that I reset the whole computer yesterday and re downloaded windows 10 and it worked fine It was holding about 130 FPS in game and running smooth I turned it off and left and when I came back I had the same problem again I have no clue what else to do I’m not sure if it’s a windows problem thanks in advance
I’m running
Msi mpg z490
Corsair h100i
Power supply evga 750 GQ
Gpu GeForce RTX 2070 super
Cpu 10th gen Intel I5
Corsair 16gb 3600