I have a built-in Intel 82579V chip in my UD3 and it's driving me crazy. My old socket 1155 board had a Realtek 8111E chip and that was flawless. This intel chip is giving me 300kb/s internet speed and 1.2mb/s network transfer speed over my GIGABIT network. I've tried all the drivers for it 16.6 and 16.7, turned off ALL TCP/Power/Offloading technologies and it is still won't go past 1.5 mb/s network speed. Cables/Router etc is good. Pop my old board in with Realtek 8111E chip = less internet lag, full 6mb/s internet download speed, over 60mb/s file transfer speed on LAN. Has anyone had any experience with 82579V chips? I think it's a driver issue but I am surprised nobody has posted about it. I can't find anything useful on google either.