Outside of just the fact that the CPU is too slow to keep up with a 1060 by a few generations, the interface of the external card adapter will also bottleneck the card. If you want a cheap way to play CSGO, buy a used desktop tower with an Intel i3 or i5 CPU (I like the HP, Dell or Lenovo tower business systems, you will get a legal Windows license and a decent quality power supply), and get a low-mid video card like the RX 460 or the new nVidia 1050. Should be about $250 for the setup, maybe 300.