New Alienware x51 R2 Graphics

I bought an x51 R2 new from the dell site and I used nvidia experience to set my games.  I have a Gtx 660 and I7-4770 8GB ram While playing Counter-Strike Go with optimal settings which is max I keep getting graphic chokes for several seconds while looking with the mouse and my fps is horrible but my fps never actually goes below 50 according to the game.  I have set custom fan speed and updated bios to A01 but issues still persist.

  My internet and ping are great no issues on that side so its not lag.  All games I use optimal settings by the experience app.  Skyrim and Just cause 2 I get these little grey transparent squares but no video or game lag.  Dell customer support ran some tests in the lowest settings possible really with a benchmark and say my video card and all of that is fine.  But I would hope a $1200 computer could run counter-strike,  and if it cannot or its just what you would think is a system issue then I need to get this figured out while its still returnable/exchangeable.   I researched the card before purchasing and it should be able to handle this no problem on highest settings.