When I first played this map (Counter-Strike: Global Offensive)

Hello, such problem was long shipping card on average 50/60 sec. maybe more, Operatives 4GB PERC 3.1 Hz before such was not, sinker 10-20 but right now this hat, I don't know what it is, and in other games everything is fine, Internet connection is stable, please tell me how to solve my problem (graphics Settings, etc., all melted no change to problem)