Motherboard problems

i'm trying to figure out what is wrong with my internet connection. it cuts out for 3-5 seconds enough to kick me off my current bf4 game(very annoying). i currently got a new router and upgraded to DOCSIS 3.0. i have changed the power pack on the router and the Ethernet cable. my brother in the other room with Ethernet also doesn't have any problems. i'm now guessing its something to do with my motherboard/Ethernet controller. and ideas guys?

 

  1. System specs?
  2. what router and what Docsis 3 modem?
  3. for an either net cable at least cat6

1. http://pcpartpicker.com/p/BxgmkL

2. netgear cg3100d-2

3. yes both cables i tried where cat 6