WiFi status speed changes a lot. It seems to role through different speeds: 351 Mbps 468 Mbps 175.5 Mbps 234 Mbps My Dell work laptop stays at 450 Mbps using Killer wireless card. When I get real close to my wireless router the speed increases and does not change. I am thinking there is a problem with this AC card in the SP3 with signal. I am showing a solid 4 bars on the icon in the task tray. Any one else seeing this speed changes?