Helpful Tips When Buying a Computer
With so many types and models of computers to choose from, it becomes quite intimidating to buy a new computer, especially if you do not have the expert knowledge of experienced computer users. Here's a quick run-down of what to look for when you buy a computer.
Table of Contents
What Will You Use It For?
Some people think that really powerful computers are all the craze, and end up with a really powerful computers that they cannot maximize. Before you buy a computer, think of what you're going to use it for. A really powerful computer with all the trimmings is underutilized if all you do is type. Here are some of the kinds of computers that are available to you:* Entry-level computers are the basic, most affordable computer packages that fit most budgets. Entry-level computers contain the essential components needed to make a computer work, in tune with the latest technology available for consumers on a budget. Almost all entry-level computers on the market today can accomplish most of the tasks required of them, at a fraction of the cost of high-end computers.
* Mid-level computers. If you're going to buy your first computer, you might as well buy a mid-level computer that combines powerful specifications with affordable parts. Mid-level computers can be easily upgraded to powerful machines.
* Multimedia and gaming computers are the top-tier computers used by designers and hardcore computer enthusiasts. Computers like these are equipped with really powerful, top-of-the-line parts and components that make the most intensive of computing jobs and tasks a breeze, like video editing and playing the most sophisticated games. Multimedia and gaming computers, though, are the most expensive ones on the market.
Crunching the Numbers
When you buy a computer, you may be confused with all the numbers presented to you by the sales attendant. While higher values generally mean a more powerful computer, you may end up with so much power and speed that you cannot maximize and utilize efficiently. Before buying a computer, focus on the following important parts and values:* Random access memory (RAM). RAM is a module used to store data, and plays a very important role in the speed and performance of your computer. Most RAM modules today enter the market at 1GB to accommodate pressing needs in new programs and operating systems. Higher RAM values can help you multi-task and run programs quicker and easier, although you may end up wasting a lot of money if you only use your computers for basic tasks like typing papers and playing simple games.
* Processor speed. With all the talk about "hyperthreading" technology and giga-speed processors, it's important to remember that a fast processor should always be bundled with a considerably big amount of RAM. Multi-core processors do not necessarily mean faster computing; the multi-core processing technology available today is useful for many CPU-intensive programs and processes like virus scans and high-end multimedia processes.
* Video. Some budget computers come with integrated video cards, although it's still best to buy a computer with a separate video card built to work well with your CPU and RAM specs. A separate video card adds more sharpness and definition to your images provided that you buy a good computer monitor.
* Disk space. There's no such thing as "too much free space," especially if you like to collect music, videos, or if you make a lot of files. The bigger the hard disk space that there is in the computer, the better. You can divide a really large hard disk into partitions to make organizing files easier.
Obsolescence
All computers grow obsolete eventually. With the current pace of technology, parts grow more powerful and more advanced, and the powerful computer you're buying may very well be an entry-level model in a few months. Unless your needs and tasks really consider the latest requirements in computing technology, there's no need to keep up with the trends as long as your computer suits your needs just fine. You may need to upgrade, though, especially if you anticipate new programs, needs, and uses for your computer. It is generally cheaper to upgrade an older computer - as long as it still complies with the minimum industry standards - than to buy a new one.Buying a new computer doesn't have to be rocket science. As long as you know what you plan to use your computer for, buying a lean mean information-driven machine can always be made easy.
Wikipedia
Category: File - :Columbia Supercomputer - NASA Advanced Supercomputing Facility.jpg|240px|thumb|The Columbia Supercomputer, located at the NASA Ames Research Center.
A computer is a machine that manipulates data according to a set of instructions.
Although mechanical examples of computers have existed through much of recorded human history, the first electronic computers were developed in the mid-20th century (1940?1945). These were the size of a large room, consuming as much power as several hundred modern personal computers (PCs).In 1946, ENIAC required an estimated 174 kW. By comparison, a modern laptop computer may use around 30 W; nearly six thousand times less.
Modern computers based on integrated circuits are millions to billions of times more capable than the early machines, and occupy a fraction of the space.Early computers such as Colossus and ENIAC were able to process between 5 and 100 operations per second.
A modern "commodity" microprocessor (as of 2007) can process billions of operations per second, and many of these operations are more complicated and useful than early computer operations.
Simple computers are small enough to fit into a wristwatch, and can be powered by a watch battery. Personal computers in their various forms are icons of the Information Age and are what most people think of as "computers". The embedded computers found in many devices from MP3 players to fighter aircraft and from toys to industrial robots are however the most numerous.
The ability to store and execute lists of instructions called programs makes computers extremely versatile, distinguishing them from calculators. The Church?Turing thesis is a mathematical statement of this versatility: any computer with a certain minimum capability is, in principle, capable of performing the same tasks that any other computer can perform. Therefore computers ranging from a mobile phone to a supercomputer are all able to perform the same computational tasks, given enough time and storage capacity.
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