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mouse. With a 2000dpi resolution, 500Hz report rate, and swappable batteries, the Logitech G7 Laser Cordless Mouse might be the best wireless gaming mouse yet.

Logitech's previous flagship laser mouse, the Logitech MX1000, is still a fine pointing device, but the 800dpi mouse is starting to show its age, compared to the faster, higher-resolution mice available today. The new G7 mouse features a 2000dpi resolution for extra-smooth tracking, and you can shift sensitivity on the fly with two buttons located beneath the scrollwheel. Like the corded Logitech G5 mouse, the G7 moves across the mousing surface extremely well, thanks to new, extra-large polytertrafluoroethylene (DuPont calls it Teflon) feet and an outrigger foot for extra stability. The G7 retains the built-in battery life indicator, but Logitech has improved power management by packaging the mouse with two rechargeable battery packs. That way, you'll always have a fully charged battery ready when your mouse starts running low on juice. It only takes a couple of seconds to flip the mouse over, press a small button to eject the battery, and slide the replacement in its place.

The Logitech G7 Laser Cordless Mouse will be available in September with an MSRP of $99.99.

Nvidia GeForce 7800 GT 256MB

Nvidia's new GeForce 7800 GT features the same accoutrements as its older brother, the GeForce 7800 GTX, but with a slightly less powerful GPU. The card will be available for purchase at an MSRP of $449. Following the tradition started with the GTX launch, GeForce 7800 GT based cards are available for purchase right now.
Nvidia didn't design a new GeForce 7800 GT chip from the ground up. Much the same way that CPU manufacturers practice speed binning, GPU manufacturers create new, lower-priced products using chips that couldn't quite make it to flagship status. The GeForce 7800 GT has the same 302 million-transistor GPU as the GeForce 7800 GTX, except portions of it have been shut down.

The PCI Express GeForce 7800 GT has 20 pixel pipelines, four pipelines fewer than the flagship GeForce 7800 GTX, but that's still four more than the GeForce 6800 Ultra. The GeForce 7800 GT also has seven optimized vertex pipelines, compared to the eight that are available on the 7800 GTX. Nvidia also dropped the core speed of the GeForce 7800 GT down to 400MHz; the 7800 GTX, in comparison, has a 430MHz core.

Since the GeForce 7800 GT has the same core as the GeForce 7800 GTX, you'll find all of Nvidia's new technologies onboard. Support for Shader Model 3.0 will come standard. Other Nvidia-specific features include HDR (high dynamic-range lighting), transparency sampling, and PureVideo. High dynamic-range lighting is used to simulate a wide range of light intensities, ranging from blinding sunlight to the darkest shadow, in a single scene. Transparency-sampling technology allows the card to clear up jaggies for lines drawn in the middle of a polygon instead of on an edge. PureVideo allows the GPU to output progressive video and to encode up to 1080i for HDTV output, as well as to accelerate and improve the quality of video playback for MPEG-2, WMV, and WMV HD on the video card.

The GeForce 7800 GT puts up serious performance numbers at the $450 price point. The ATI Radeon X850 XT PE offers some fierce competition, but the card simply can't compete at the same price point as the GT. In every single one our tests, the GeForce 7800 GT comes away the clear winner against the Radeon X850 XT. With the release of the GeForce 7800 GT, be on the lookout for falling prices from both GPU manufacturers. The GeForce 7800 GT will push GeForce 6800 series GPUs down the price ladder one notch, and ATI's Radeon X800 lineup will have to match the drops to remain competitive.