Low fps (Counter-Strike: Global Offensive)

System i5 3470T 3.3 GHz, GTX 1050ti, 4gb RAM, windows 7 64bit
In cs go gives small fps for this graphics card 120-150, although in the past Radeon 4730 issued 150-180. However, due to smoke does not SAG, the wood is all new. In other games all right. The Witcher 3, for example, 50-60 fps at high with no hair. I test using MSI Afterburner. So in the Witcher vidyuhi uploaded to 99% and COP 50% of the CPU rests on 40-60%. Tell me what to do with this? Is it possible to do something?