LCD and Viewfinder
Nikon D3X has a Fixed Type 3″ LCD screen with a resolution of 920k dots. Both the screen size and the screen resolution is up to the standards of this class.
D3X has a built-in Optical (pentaprism) viewfinder.
The viewfinder has a coverage of 100% and a magnification ratio of 0.7×
Nikon D3X can shoot continuously at max speed of 5 fps and has max shutter speed of 1/8000 sec . Unfortunately D3X doesn't have a built-in flash but there is a port for mounting external flashes.
Nikon D3X features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 51 points to choose from.
Unfortunately Nikon D3X doesn't have Video recording ability.
Connectivity and Storage
You can connect your camera to other devices through HDMI port or via USB 2.0 (480 Mbit/sec) port.
Nikon D3X is powered by EN-EL4a battery which provides a shooting life of 4400 according to CIPA standards.
Considering that the average battery life of DSLR type cameras is 875 shots, Nikon D3X has a good battery life for its class.
Battery Life Comparison in Pro DSLR Cameras
You can download Nikon D3X's User Manual here
Current Lowest price for Nikon D3X is $2,999.99