We ran the TouchSmart 610 Quad through a gauntlet of performance tests in the PCWorld Labs, and the results show that this PC has hardware beefy enough to handle light office work, streaming media, and heavy-duty gaming with aplomb. The 610 Quad earned a score of 135 in our WorldBench 6 benchmark suite, trumping its predecessor (the , with a paltry score of 104) as well as the top performer in the category (the , with a mark of 121), making it one of the fastest all-in-one PCs we've tested so far.

Those numbers mean that it's possible to play contemporary games on the TouchSmart 610 Quad at acceptable frame rates. Our review machine maintained 47 frames per second while running Unreal Tournament 3 at 1680-by-1050-pixel resolution on the highest graphical settings. In Dirt 2 its performance was less impressive, as it managed only 22 fps at the highest graphical settings and the same resolution. That's the best gaming performance of any all-in-one PC we've tested, however; and although most games don't play well with the touchscreen controls (R.U.S.E. being a notable exception), the TouchSmart 610 Quad can easily accommodate accessories such as a wireless mouse and keyboard thanks to the plethora of USB ports nestled about the case.

Though the case itself is unremarkable, the TouchSmart 610 Quad boasts a slim design and a small footprint, so it's easy to install in home and small-office environments. The hefty black plastic housing sports a pair of USB ports recessed into the left edge, as well as headphone and audio-out jacks, a six-in-one card reader, and volume controls (including a handy mute button). Along the right side you'll find a pair of HDMI inputs and a slot-loading DVD drive, which you can upgrade to a Blu-ray drive. Everything else--two more USB ports, two USB 3.0 ports, a TV tuner, and the power jack--is concealed beneath the sliding rear panel. The front offers nothing save an adjustable-tilt Webcam, a microphone, and a few choice pieces of branding.

The innovative swivel stand deserves special mention: The screen slides forward and down to accommodate comfortable use of the touchscreen for prolonged swiping sessions. Slide the screen all the way down, and the TouchSmart 610 Quad comes to rest atop the base at roughly a 30 degree angle, nearly parallel to the desk ( to see it in action). Be aware that adjusting the unit up and down takes some practice--sliding the screen requires a significant amount of force. After only a brief look at the device, I mistook that resistance for poor design and shoddy construction, but it's actually intended as a safety feature; HP designed a proprietary braking system for the 610 Quad that employs spring-loaded brake pads staggered unevenly along the TouchSmart's spine to keep the weighty 23-inch display safely in position as you type and swipe away at the screen.

Speaking of swiping, we've been consistently impressed with HP's TouchSmart gesture-control software; tons of touchscreen devices pass through the PCWorld Labs, and TouchSmart 4.0 is the best touch interface we've seen. Though the TouchSmart 610 Quad comes with Windows 7 preinstalled--you can use your fingers as you would a traditional mouse to navigate the Windows interface--it's much easier to launch the TouchSmart software and browse through movies, music, and games with the flick of a finger. Flipping from app to app is quick and easy, though multitouch gestures aren't easy to pull off and moments of frustration still crop up when the software stutters or fails to register a command.