I was wondering is it possible to stay around 300$-330$ for a gaming pc for CSGO that can run low settings 100+fps
I do not believe it is possible with this budget to run CS:GO at +100FPS. That's a $200 computer. It might run the game, but it will be nowhere near those FPS.
I stand corrected. According to this:
A Skylake iGPU could probably do the job on this budget. Add a dGPU down the road.
Really hard. That's the best I could do. I managed to get a dedicated GPU in there which should give you better performance than without one.
PCPartPicker part list / Price breakdown by merchant
EVGA 430W pls.
I'm well aware that its far from ideal... but it'll handle the PC's TDP and has next to no possibility of catching on fire... and seriously, there's a $300 budget. You can only do so much.
An option if you MUST have windows.