Our review model sports an Intel Xeon E31280 processor, 16GB of RAM, and an Nvidia Quadro 4000M graphics card, and runs a 64-bit version of Windows 7 Professional. The graphics card alone currently goes for around $750 online, so that's a big chunk of the Z1's hefty price tag. The model we tested also features built-in Bluetooth 3.0, built-in Wi-Fi, a high-def (1080p) 2-megapixel adjustable webcam, and a Blu-ray Disc writer. Budget-minded shoppers can pick up the Z1 with lower-end specs (such as a 32-bit OS, a DVD-RW drive, or an Intel Core i3-2120 processor) for less, as the Z1's base configuration starts at $1899.

I'll just go ahead and say it: This machine is, hands down, the most powerful all-in-one PC we've ever tested. In PCWorld's , the Z1 posted an impressive score of 159. That means the Z1 is 59 percent faster than our baseline model, a desktop with an Intel Core i5-2500K processor, 8GB of RAM, and an Nvidia GeForce GTX 560 Ti graphics card. The score puts the Z1 well ahead of the rest of its class (most large-screen AIOs score in the 80-to-100 range on WorldBench 7), and even ahead of some of our lower-end performance tower desktops.

The Z1 also offers impressive graphics performance, thanks to its Quadro 4000M professional workstation graphics card, which supports high-quality 3D. In PCWorld's Dirt 3 graphics tests, the Z1 delivered very good frame rates of 69.1 frames per second (high quality, 1680-by-1050-pixel resolution) and 112.9 fps (high quality, 1024-by-768-pixel resolution).