PC not running csgo well, plz help.

pupovacs

Commendable
Aug 9, 2016
50
0
1,630
i7 4770k 3.5 ghz
asus z87 plus motherboard
gtx 970 4gb
I play 1024x768 black bars all settings low. I use a 144hz monitor so I need the fps to never drop below that value, but it drops from 200 to 70 causing bad screen tearing on this monitor, someone please help me, been stuck with this for a while.
 

pupovacs

Commendable
Aug 9, 2016
50
0
1,630

I have an HMW xg-h800 (800w)
Link: http://www.ebay.ie/itm/311400241792 (didn't buy it from ebay) (also mine is the 800 watt version)
And I play csgo but overall the setup is underperforming for all games