This page and the information on it are slightly dated, however the basics still hold true today. Speeds referenced may have changed but a good understanding of basic features can still be obtained here.

CPU Bus Speeds and Front-Side-Bus (FSB) Explained

The CPU bus speed also known as "front-side bus speed" (or FSB) and is the speed at which the CPU communicates with RAM memory and the motherboard chipset. Athlon XPs have a 266MHz MHz or 333MHz FSB, Pentium 4s have a 400MHz, 533MHz or 800MHz FSB, AMD Durons have a 200MHz FSB, and socket 478 Celerons have a 400MHz FSB. With that being said, you should never assume that the CPU with the fastest front-side bus is the fastest performer. There are many factors that influence CPU speed, the most important are its design and efficiency of its floating point unit, the internal clock speed of the CPU (the GHz speed it's rated for), and the speed of its L2 cache. When choosing a FSB speed for the CPU you choose, be aware that you'll need to purchase memory capable of this faster speed. For example, many people are enticed by the remarkably low prices to be had on some older laptops. While these laptops may be outfitted with  Pentium 4 CPU, the consumer needs to carefully review the specifications for the laptop. Is the RAM provided typical SDRAM PC!## or is it DDR SDRAM 266MHz. If you fail to catch this difference you will have a laptop that is in effect very little faster than a Pentium III laptop. The RAM will keep your speeds from reaching the full potential. All M-Tech systems use PC2100 DDR SDRAM 266MHz  RAM for you to experience the full speed and performance available in today's technology

DDR Memory

Before DDR SDRAM there was PC133 SDRAM, still used today but quickly being replaced by DDR. DDR SDRAM utilizes the existing SDRAM infrastructure and technology while doubling the nominal bandwidth available to systems. In plain English, imagine that PC133 SDRAM is like data going along a one way street. DDR SDRAM is like data going along a two lane highway, as DDR stands for Double Data Rate. What is this good for? Well, any application really. Everything uses RAM and therefore everything from the Operating System to intensive 3D gaming benefits from the increased speed of DDR SDRAM. DDR-SDRAM has another important improvement over PC133 SDRAM. Its voltage supply is only 2.5V, instead of 3.3V. This and the lower capacitances inside the memory chips lead to a significantly reduced power consumption, which makes DDR-SDRAM very attractive for notebooks

If you're into digital video, a Firewire interface is a must-have for your PC. It's the only way you'll be able to edit your mini-Digital Video footage. With a firewire interface in your computer, you can add special effects, alter the arrangement of your video clips, add titles, and perform many more cool functions. The high-speed Firewire interface between your digital camcorder and your PC allows quick and easy transfer of your video. Without Firewire, it would take hours to transfer just 30 minutes of video to your PC for editing! Virtually every mini-Digital Video  camcorder produced today has a built-in Firewire connection.

S/PDIF (Sony/Philips Digital Interface) Connector

S/PDIF (Sony/Philips Digital Interface) is a newest audio transfer file format, which provides impressive quality through optical fiber and allows you to enjoy digital audio instead of analog audio. Normally there are two S/PDIF outputs as shown, one for RCA connector, the most common one used for consumer audio products, and the other for optical connector with a even better audio quality. Through a specific audio cable, you can connect the SPDIF connector to other end of the S/PDIF audio module, which bears S/PDIF digital output. However, you must have a S/PDIF supported speaker with SPDIF digital input to connect to the SPDIF digital output to make the most out of this function.

Bluetooth
Bluetooth® technology is a cutting-edge open specification that enables short-range wireless connections between desktop and notebook computers, personal digital assistants, mobile phones, camera phones, printers, digital cameras, keyboards and even a computer mouse. Bluetooth wireless technology uses a globally available frequency band (2.4GHz) for worldwide compatibility. In a nutshell, Bluetooth technology unplugs your digital peripherals and makes cable clutter a thing of the past. With Bluetooth technology integrated in you can link your Palm OS-based handheld device, mobile phone and other peripherals with Bluetooth technology — and do it wirelessly, within a 30-foot range.