windows 8.1 cpu utilization

hey guys I am needing advice on what kind of PC to get. The main focus of the PC will be to have 200 windows open all playing Spotify or another streaming app with all playing music. I currently have a Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz, 3600 Mhz, 8 Core(s), 16 Logical Processor(s) and I...

http://www.currys.co.uk/gbuk/computing/desktop-pcs/desktop-pcs/lenovo-h30-desktop-pc-10108801-pdt.html the graphics card i am looking to buy is http://www.maplin.co.uk/p/asus-nvidia-geforce-gt610-ddr3-2gb-graphics-card-a81lg