Make sure you have minimum system for run Cs Go:
RAM: 3GB and higher
Graphics: +GT-730 and higher to play at acceptable resolution
CPU: +dual core (if you have i3 u can get more than 150 fps with this guide)

Set Launch Options:
1- Open your Steam library
2- Right click on CsGo and choose Properties
3- Set Launch Option
Paste this in your launch option:
+snd_use_hrtf 0 -console -novid -nojoy +cl_forcepreload 1 -nod3d9ex1 +fps_max 0 +cl_autohelp 1 +cl_showhelp 0 +snd_use_hrtf 0 -freq 60

1- Right click on desktop and choose Nvidia Control Panel
2- Go to Adjust Image Settings with Preview and choose Use the advanced 3D image settings
3- Go to Manage 3D Settings and choose Program Settings
4- Use this settings : Picture [i.imgur.com]

1- Go to Control Panel
2- Power Options
3- Choose High Perfomance

Do this options for your game: Picture [i.imgur.com]

Please Dont Forget Like This Guide