Low fps with good pc,whats happening?gtx 1050ti 4g

i build a pc recently,not more than two months old brand new. https://pcpartpicker.com/list/gzQ6hy these are the parts and i have low fps for what its supposed to have lately however after last patch my fps became even lower, i started the lane like 100-90 and during all the rest it even drops to 60fps! i ve had all the technical solutions by riot done but still nothing, any ideas why i have so low performance even though my specs should be way higher?
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