Little Help With Linksys E1500/ Killer E2100 NIC Connection Issues

I'm a network novice at best, and I've tried anything I know (ipconfig stuff mostly), but here's the issue:

My room mate is hooked up to the router via port 2, I'm on port 1. I start a server or start playing ON a server, then when he connects it drops all gateway and DNS information from his machine. The only action we've been able to take to revive the connection is ipconfig /renew then a system reboot. Obviously not ideal...

 

Some other parameters for the network:

  1. I do not lose connection and the network is still active on wireless devices and other ports
  2. Running a ping test from his machine to a server comes back with all the info, only connecting causes the white out
  3. The router is only 10/100, but our network is only 57mbps down
  4. There is no IPv6 or IPv4 firewall configured
  5. All drivers for the Killer NIC are installed and up to date, the board is a Gigabyte G.1 Sniper (X58 version 1.0)

I'm wondering if there's something I'm missing here. I personally believe it's a fault with his NIC, but I'm just not familiar enough with networking to get down to the nitty-gritty and figure this out.

Any advice or tips would be awesome.