PCTechNoob

Make sure that there isn't anything USB related disabled in the BIOS that shouldn't be.
Otherwise, the port just might not be able to support that type of data transfer or have enough power to power the USB storage device. If you have other available USB ports to use, then I would just use them and use the front ones for your keyboard and mouse and not worry about it.

With OBS you can use the on-board graphics of Intel chips or your GPU to improve streaming. So, you're pretty much fine no matter what these days.

The only thing I can say is 27 inch is defiantly big enough for gaming and other tasks. I used a 19 inch for years and I thought that was big. When I upgraded to 24 inch it was overwhelming. Also, bigger screens sometimes have higher input lag which is bad for competitive gaming.

Haha thanks, ill just pick a cheap, wireless headset and use that.

where did you get this research from?
 
and i would get this
 
PCPartPicker part list / Price breakdown by merchant   CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor  (£141.22 @ More Computers)  CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler  (£24.95 @ Aria PC)  Motherboard: ASRock H97M PRO4 Micro ATX LGA1150 Motherboard  (£68.06 @ Amazon UK)  Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory  (£40.88 @ Aria PC)  Storage: Sandisk X110 128GB 2.5" Solid State Drive  (£37.58 @ Scan.co.uk)  Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive  (£32.40 @ Aria PC)  Video Card: Gigabyte Radeon R9 280 3GB WINDFORCE Video Card  (£167.82 @ PC World Business)  Case: Cooler Master N200 MicroATX Mid Tower Case  (£28.60 @ Amazon UK)  Power Supply: EVGA SuperNOVA NEX 650W 80+ Gold Certified Fully-Modular ATX Power Supply  (£63.31 @ Amazon UK)  Total: £604.82 Prices include shipping, taxes, and discounts when available Generated by PCPartPicker 2015-07-13 21:28 BST+0100

Thanks for the help, I will try reinstalling bootcamp and then see it it works. And yes, the keyboard and mouse does work on OSX if you were wondering.