Question Unstable fps?

May 12, 2020
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Benchmarks: https://www.userbenchmark.com/UserRun/27955635

My grpahics card is a gtx 1060 6gb and I have my cpu clocked to 3.3 ghz.
Well my problem is that I just cant seem to get stable fps even though i lock it to 60. For example, the outer worlds on medium settings without limiting it gives me around 100 fps, it drops a lot but never below below 70 but when I lock it to 60 it drops to 57 55 and sometimes even 52. The same goes for CSGO without an fps limiter its around 200 fps but when i lock it to 60 it sometimes still drops. Oh yeah I have a 122 hz monitor

What could be the cause of this? And how can you fix it?