Upload speed aren't that high? Slow upload speed

Hi, for some reason my pc is downloading at an extremely slow speed. When I first got the pc it had a download speed of around 250-350 now its ranges from 1-10mbps. My brother has a very similar pc with almost the exact same parts and still gets a high download and upload speed (we both use...

Okay, so the back of my motherboard and graphics card can support a combined 6 monitors. Is it possible to get around that without getting another motherboard/graphics card? Currently have 3 and, just curious. Is there such of a thing that'd almost be like an extension cable but with monitor slots?