Posted 11/18/09 at 03:30:00 PM by Mark Edward Soper

The "U" in USB stands for "Universal", and no other I/O port does so much for so many computer users as USB. From providing a home for keyboards and mice to driving printers, scanners, all-in-one units, and providing access to terabytes of storage and the Internet, USB ports do it all. That also means that USB-related problems can cripple your PC, leaving it unable to access storage, input, and output devices.

Tracking down the causes of USB-related woes can be difficult, but in this article, we show you the common and uncommon causes for USB problems – and their solutions.

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Posted 11/18/09 at 11:00:00 AM by Loyd Case & Gordon Mah Ung

You can forgive AMD for stealing a line from Nvidia’s playbook. From the name and marketing materials, it’s not obvious that this card is a dual GPU card. One AMD chart even refers to the card as the “ATI Radeon HD 5970 GPU,” much like Nvidia’s 295 GTX is a dual GPU card that’s sold as if it were a normal graphics card.

We first take a quick look at the speeds and feeds of the new card, and then discuss additional features. We’ll compare them to the Radeon HD 5870 single GPU card; there are differences in core and memory clock speeds. Then, we jump into the benchmarks, comparing the Radeon HD 5970 to four other videocards in high-resolution gaming. 

And if those numbers don't impress you, wait until you see how this beast performs in Crossfire for a total of four GPUs. 

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Posted 11/18/09 at 08:30:00 AM by Will Kraft

So you've read our Complete Beginner's Guide to Linux and have decided to adopt an open-source operating system--congratulations! But diving right into a new OS is daunting, even if it is as polished and stable as Ubuntu. That's OK though, because we're here to help. We've compiled a list of the 20 most important skills that every Ubuntu user should have. These tips, ranging from basic GUI manipulation to advanced system recovery, are essential to your Windows-free computing experience. Whether you've just installed Ubuntu for the first time or have been a Linux acolyte for years, you'll want to read our refresher. And if you have any tips you can't live without, we'd love to hear about them in the comments section!

Read on to get started!

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Posted 11/17/09 at 10:30:00 AM by Loyd Case

AMD’s recent release of its RV870 GPU line makes the company the undisputed graphics performance leader. The Radeon HD 5870 is the fastest single-GPU graphics card on the market currently. But at roughly $380, it’s not inexpensive, so AMD has also rolled out the Radeon HD 5850, 5770, and 5750 cards. All are DirectX 11–capable, at lower price points than the flagship HD 5870.

The HD 5850 uses the same RV870 GPU as the 5870, but with a couple of functional units disabled. Priced at around $260, the 5850 occupies the lower tier of the high-end cards. The recently released 5770/5750 cards use a different chip. Based on the same DirectX 11 architecture as their big brothers, the 5770/5750 are built with 1.04 billion transistors—just slightly more than the 956 million used in the previous-generation Radeon HD 4870/4890 products. Contrast these numbers with the 2.15 billion transistors in the Radeon HD 5870. Current prices for 5770s are roughly the same as older 4870s, around $150–$160. So the 5770 is firmly positioned as a midrange graphics card.

We put eight cards to the test, from six companies: three Radeon HD 5870s, three HD 5850s, one HD 5770, and a factory-overclocked Nvidia GTX 260 from Gigabyte, our token Nvidia card in the mix. Read on to see which one is the best for your budget!

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Posted 11/16/09 at 11:14:21 AM by Loyd Case

AMD has wasted no time bringing its DirectX 11 GPU architecture to a more affordable, mainstream-class GPU in the HD 5770. HIS is one of the first manufacturers to bring the HD 5770 to market.

At around $160, the card is priced similarly to existing Radeon HD 4870 cards. It’s the lowest-cost card in the roundup, and given the 180mm2 die size (that’s incredibly tiny for a GPU), prices are likely to eventually come down even further.

Read on for the full review!

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Posted 11/16/09 at 11:09:43 AM by Loyd Case

It’s easy to be seduced by the latest and greatest graphics cards, but you can sometimes find excellent deals in older-generation cards that can still keep up with today’s shader-heavy PC games. Gigabyte’s 260 GTX SuperOC is a good example.

To make the cards, Gigabyte starts with cherry-picked 260 GTX chips from the factory. Then it clocks the GPUs at 680MHz, more than 100MHz faster than the standard 576MHz. Similarly, the SuperOC pushes the shader clock to 1,466MHz, instead of the stock 1,350MHz. Rounding off the performance push is 896MB of GDDR3 running at 1.25GHz instead of 1GHz. Gigabyte delivers these rarefied clock rates at slightly less than $200.

Read on for the full review!

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Posted 11/16/09 at 10:59:42 AM by Loyd Case

As with Sapphire’s Radeon HD 5870, the company’s HD 5850 card ships with coupons for two games: Dirt 2 and Battlestations: Pacific. Sapphire’s HD 5850 delivers a stock Radeon HD 5850, with its 1,440 stream processors, 72 texture units, and DirectX 11 support.

In our power-usage testing, Sapphire’s power draw was about average for an HD 5850. Our system power averaged 140W at idle, while pushing 260W at full throttle. Fan noise was fairly loud at full bore, but that was generally true of all the cards. At idle, overall noise levels were low enough to blend into the background of CPU, power supply, and case cooling.

Read on for the full review!

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Posted 11/16/09 at 10:49:01 AM by Loyd Case

We admit to mixed feelings about Diamond’s Radeon HD 5850. On one hand, it offers the same strong performance as other Radeon HD 5850 cards—second only to their big-brother HD 5870 cards. But unlike other manufacturers, you don’t get a coupon for Dirt 2 in the box. Instead, you need to register the card at Diamond’s website to get the perk. You also won’t get the two-year warranty unless you register the card.

Read on for the full review!

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