I have this problem with my brand new PC i built ( http://pcpartpicker.com/list/XGjMt6 ) , I am using an ethernet cable that I plugged into my router, my laptop is getting way faster speeds on wifi. I'm sure I have the ethernet drivers installed on the motherboard ( http://www.gigabyte.com/products/product-page.aspx?pid=... ) but im still getting awful internet speeds. I'm trying to install Skyrim from Steam but im only getting 100kb/s average. If anyone could help that would be appreciated!