My game is lagging for no reason

Hey, I have an issue, I go on sandbox and every time i spawn, the game lags out but the thing is everyone I noclip, the game runs at 60fps and then when I get out of noclip the game lags out again. Why? I’ve verified the cache, i’ve updated my drivers and still it doesn’t work, what’s going on?

[editline]21st December 2016[/editline]

And for some reason, everytime i get out of noclip, i go through the map

Get rid of all of your addons.