Processor
At the heart of any computer lies the CPU (or processor), a massive collection of miniature transistors that governs the speed and power of the entire unit. For the VAIO VGC-RB44G, Sony balances speed with affordability by incorporating an Intel Pentium 4 640. This is one of Intel's recently upgraded Pentium 4 chips, featuring two full megabytes (MB) of Level 2 cache for even faster real world operation than last year's model, which sported an already impressive one MB Level 2 cache. Operating at a speedy but not top-of-the-line 3.2 GHz and of course sporting Intel's Hyper-Threading technology (Hyper-Threading allows a single CPU system to behave at times as a dual CPU system, thus adding substantially more speed to some high-end applications), this CPU delivers more raw horsepower than many users are ever likely to require.

Memory
Computers typically store information on their hard drive, but they keep frequently and recently accessed data in Random Access Memory (RAM) for faster retrieval. More RAM means more efficient computing, superior multitasking and less strain on your hard drive. Currently, 512 MB of RAM is considered sufficient for most applications and multitasking situations, though demanding users will want more. Fitted with a full one gigabyte (1034 MB) of high-speed PC3200 400 MHz RAM, the VAIO VGC-RB44G delivers instant response no matter how many programs you're running.

Video
CPU's are usually so busy doing basic calculations that they need help translating visual output -- particularly the demanding 3D visual output of games and 3D animation packages -- to the viewing screen. This is the duty of the graphics card (or graphics controller). A graphics controller with "dedicated" video memory is preferable to a controller that's integrated on the mainboard and "shares" the system's main memory, as it will better handle complex procedures and display a more sophisticated, smoother image. The good news is that the VAIO VGC-RB44G features a graphics controller with dedicated video memory -- an ATI Radeon X300. The not-so-good news for those who absolutely require top-notch 3D graphics performance is that the X300 carries just 128 MB of video memory. In a time when many cards sport 256 MB or 512 MB and many game manufacturers optimize their software for a 256 minimum, the X300 may not be enough for serious 3D fans. Though it's far superior to an integrated controller and will handle all 2D and many 3D applications, it is not an ideal gamer's card.

Display
Sony has not included a display screen, thus allowing you to continue using your current monitor or select from today's many alternatives.

Sound
The VAIO VGC-RB44G generates stereo and surround sound via an audio chip integrated on the motherboard. This arrangement doesn't offer the power or the sophistication of a high-end sound card, but it's more than sufficient for the enclosed set of stereo desktop speakers.

Hard Drive
The unit's massive 250 GB internal hard drive is spacious enough for a massive allotment of files and applications and a comprehensive music, video/photo and multimedia library too. Furthermore, this particular hard drive is quick -- sporting a fast 7200-RPM speed, an 8 MB buffer, and a cutting-edge Serial ATA connection. These are all comparatively recent innovations, each increasing the overall speed and performance of the system.

Optical Drive
An optical drive is essential in today's computing world. A "CD-ROM" drive allows you to install CD-based applications and play music CDs. A "CD-RW" drive adds CD "burning", so you can also backup your important files to long-lasting discs and create personalized music CDs. With a DVD-ROM drive you can enjoy all of the above plus watch the same big budget DVD movies you watch on your home entertainment system. And with a DVD-RW drive, you can also "write" home movies to durable discs and archive files to DVD (DVDs boast more than seven times the storage capacity of CDs).

This unit features two optical drives -- a DVD-ROM drive for playing music and data CDs and DVD movies, and a DVD+R Double Layer/ DVDRW drive through which you can not only do everything above but also take advantage of new double layer DVDs (twice the capacity of traditional DVDs). Moreover, this two-drive setup allows you to make extremely fast CD or DVD copies.

Connectivity and Expansion
With six high-speed USB 2.0 ports, you'll have lots of room for plug and play gadgets such as digital cameras and printers. The unit also features two IEEE 1394 "FireWire" ports (commonly used for fast data transfer from digital camcorders), an S-Video input for loss-less digital video, composite video-audio inputs and a coaxial input to run signals from other sources through your computer (for recording television programs on your hard drive, for example), a DVI-D output to send an optimal digital video signal from the computer to a flat-panel display, and a memory card reader for uploading data from today's most popular memory cards. Communication options include a standard Ethernet LAN interface for fast network and Internet access and a 56K data/fax modem for low-speed dial-up connections.

Operating System and Software
Multimedia fans will find a lot to like in the unit's operating system, Microsoft's Windows XP Media Center Edition. Also bundled with the VAIO VGC-RB44G is Microsoft's Works 8.0 productivity pack, Intuit's Quicken 2005 New User Edition financial suite, a half dozen of Sony's own top notch multimedia tools, and several time-limited trial editions of popular security and Internet utilities.