The M6400 is available with an Intel Core 2 Duo Quad-Core Extreme Edition, up to 16GB of DDR3 10666MHz RAM, and as much as 1GB of dedicated video memory. It features a 17" display, two storage drive bays with a slew of HDD and SDD configurations, 802.11b/g/n, a Blu-ray drive, Bluetooth, a smart card reader and an AT&T HSDPA module.
Naturally, Dell has intended for this to be used as a desktop replacement, and as such it weighs a hefty 8.5lbs when equipped with a 9-cell battery. The system is currently available with Nvidia's Quadro line and has pretty solid reviews. The ATI FirePro M7740 is expected as an option this month.