Dell Precision 6800 here. Do not recommend. I too experience constant erroneous thermal throttling (in Windows). The docking station has extremely poor constr

Dell Precision 6800 here. Do not recommend. I too experience constant erroneous thermal throttling (in Windows). The docking station has extremely poor construction; any connectivity that travels through it flickers with the slightest mechanical provocation. External displays don't work at all unless you disable switchable graphics and have severe compositing glitches regardless. The official ubuntu install is so old that neither Firefox nor Chrome can install latest (without offroading dependencies), a modern ubuntu install without special drivers causes the backlight to turn on and off at 30Hz (hadn't seen that before!), and Dell's instructions for packaging drivers (can't just install them, you need to build an image) have broken in enough places to sink my best efforts.