I've just recently have gotten a computer which is supposedly gaming computer and with that I got a 144hz monitor to compensate for the good fps I am supposed to get for games such as CS GO. My CPU is the: AMD Athlon X4 860k OC'd to 4.3Ghz and I'm running a MSI GYX 750ti with 8GB of 1600mhz DDR3 ram. I have updated my drivers, tried upgrading the motherboard drivers, I've made sure I'm not using my integrated gpu but my dedicated GPU and I am just very confused on how retarded FPS I'm receiving. At the start of a launch on a 16 man server I receive 200 fps which quite quickly goes down to a 150 and then to a 80 within roughly 5 minutes. This happens to me every single time I join a server and I do not know what could be the cause for it. I haven't fully activated my windows and maybe, not having a "PROPER" Windows is the problem. I'm really getting frustrated with this and any help would be very much appreciated.