This D800 has the 1920 by 1280 screen and the touchpad defaults are way too slow. I looked for a tool to adjust it but don't see one. I edited xorg.conf to look like this:

Section "InputDevice" Identifier "Synaptics Touchpad" Driver "synaptics" Option "SendCoreEvents" "true" Option "Device" "/dev/psaux" Option "Protocol" "auto-dev" Option "HorizEdgeScroll" "0" Option "MinSpeed" "0.75" Option "AccelFactor" "0.50" Option "SHMConfig" "true" EndSection