The Optiplex 780 USFF can be configured with dual-core Celeron, Pentium, and Core 2 Duo processors -- all of which are paired with GMA 4500 graphics. The system has an on-board 180W power supply with a 90% efficiency rating -- as opposed to an external brick.
The 780 USFF does rely on a few notebook-oriented parts though, like a 2.5" hard drive. A base configuration starts at $624 and features a 2.2GHz Celeron, 1GB of RAM, a 160GB HDD, Windows 7 and three years of on-site assistance.
Dell has also upgraded its Optiplex 3 series, replacing the 360 line with 380-branded machines. The new units use Intel's G41 chipset which opens the door to Core 2 Quad processors and DDR3 1066MHz RAM. Despite the change, pricing seems to be the same, with stock configurations ranging from $329 to $349.