Five Things to Consider When Buying a Computer

#3: Computing Power

Here are some guidelines to follow when assembling your new PC's innards. Your choices in OS and form factor don't make a lick of difference if you don't have the computing power to put them to good use.

CPU
While you can still buy computers powered by Intel's Core 2 family of processors, you'd do better to skip them in favor of the newer Core i3, Core i5, and Core i7. If you'll only be using your computer for Web browsing and the occasional Office document, the i3 should be fine. Users who might do light photo editing, watch HD video, and are serious multi-taskers should opt for the Core i5 series (and preferably 6xx models when shopping for desktops). The most demanding users will want a Core i7. These quad-core processors are built to handle HD video editing and sophisticated games.

AMD has a few viable choices for budget-minded computer shoppers. Its Phenom II X4 processors offer great bang for the buck, but they can't compete with Intel's best offerings. And here at Switched, we're of the opinion that buying a new PC is not the time to start scrimping.

In a netbook, there is really only one logical option: Intel's new Atom N450.

RAM
When it comes to RAM, more is better. As a rule, 4 gigabytes (4GB) is the minimum you should accept in a desktop or laptop. Obviously, 6GB is better, but a jump to 8GB would benefit only gamers and heavy media editors.

Storage
Just like RAM, hard drives are a "bigger is better" affair. Look for 250GB drives in laptops, and 500GB drives in desktops. Of course, if you plan to store lots of videos, photos or music, go bigger -- or, invest in an external USB drive.

Optical DriveDo you have or want to build an extensive collection of Blu-ray discs? (Don't worry, neither do we.) Will this computer be serving as your primary vehicle for consuming entertainment? If you answered in the negative to either of these questions, skip the Blu-ray drive, and stick with the significantly cheaper DVD burner that comes standard in all but the tiniest of PCs.

Graphics CardMost users will welcome integrated graphics by way of Intel's GMA HD series, NVIDIA's 9 series, or one of AMD's myriad options. Those cards will handle Windows 7 eye candy, HD video, and anything the Web can throw at them with aplomb. However, gamers and users who do a lot of video or photo editing, will want to opt for a discrete card from either AMD or NVIDIA. AMD's 4xxx line and NVIDIA's G2xx series will keep all but the most demanding users happy. Serious gamers will want to look at AMD's 5xxx options as well as NVIDIA's top-of-the-line G295 and G285.

If you plan to watch HD video on a netbook or nettop, look for one packing a card from NVIDIA's Ion platform.