For that budget, prebuilt options from a place like CYBERPOWER or IBuyPower could easily run CSGO at max settings with over 100 FPS. The problem with prebuilt is obviously youre not getting the most bang for your buck. https://www.cyberpowerpc.com/system/Gamer_Xtreme_1000 here is one of the many I found that should reach the FPS that you want. I recommend upgrading the graphics card if you plan on playing other more intensive games as the GTX 950 that it comes with is a midrange card. A gtx 960 or 770 would go just fine with that build.
For that budget, prebuilt options from a place like CYBERPOWER or IBuyPower could easily run CSGO at max settings with over 100 FPS. The problem with prebuilt is obviously youre not getting the most bang for your buck. https://www.cyberpowerpc.com/system/Gamer_Xtreme_1000 here is one of the many I found that should reach the FPS that you want. I recommend upgrading the graphics card if you plan on playing other more intensive games as the GTX 950 that it comes with is a midrange card. A gtx 960 or 770 would go just fine with that build.