Whenever streaming audio/video or doing anything that requires high bandwidth my router will cut out. I will stop receiving internet and will continue not to have a connection until the router is restarted.
Here are the easy reproduction steps for me:
Download a game on steam / stream on netflix at the same time. Steam will download at roughly 8-9Mb/s and Netflix will take it's usual 1-2Mb/s. This will last for roughly 6-7 minutes before the router crashes and requires a reboot. The router lasts longer without both working at strain but it seems that the issue is hitting over 10mb/s on my PC through a wired connection.
This problem has only occured after reinstalling windows 8.1 pro with a new motherboard (Crosshair V Formula-Z) and the new LAN adapter is an Intel(R) 82583V Gigabit Network Connection. I cannot update this driver due to some weird, strange, issue.
Note: This works completely fine when downloading through a laptop / wireless device. I have not yet tried wireless on my PC; I shall later.
Edit: I am more than aware that this could be an issue with my adapter; though I am also aware that this adapter doesn't have issues with other routers. All driver updates also crash the router so it's the adapter itself rather than the driver.