Lag Stuttering in games GTA5 and fortnite After replacing blown psu

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I’m getting massive lag spikes in games like gta 5 and fortnite after replacing my blown 500w psu with a brand new Thermaltake 500w psu my cpu temps are good and gpu useage and temps are good too. I’m very confused and would like all the help I can get
Amd Fx 6350
Gtx 1050ti
8gb ram
1tb hard drive
Windows 10 64

 

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Ram was not seated correctly