Laptops are becoming increasingly more popular, and have evolved so much that some business people and individuals are using them as their only computer. The reasons laptops are popular is that they are portable, they use far less power than desktop computers, and they make less noise. The disadvantages of laptops, however, are that they are usually slower than desktop models, have fewer graphics, and their power to process sound is not as robust. As laptops are upgraded, however, many of these differences are not substantial enough to even be noticeable to the average computer user.
Laptops are generally more costly than desktop computers, although that may not be the cost for much longer. The price of both is falling continually, with the price of laptops dropping more quickly. As of May 2005 more laptops were sold in the United States than desktop computers. Laptops and desktops are actually quite similar in design, with the same basic software, hardware and operating systems. The basic difference between the two is in how these components are fitted together. Laptops, of course, of necessity, must have more compact components.
Desktop computers have motherboards, hard drives, video cards and their other hardware components assembled together and housed in a large case, commonly referred to as the CPU (central processing unit) or the tower. In a desktop model the keyboard, mouse, monitor, printer and other peripherals are connected to the tower by wire or through the newest technology are connected wirelessly. Each CPU or tower has plenty of extra internal space for additional cards, cables and the circulation of air.
A laptop, of course, is considerably smaller and lighter weight than the smallest tower for a desktop. Neither the mouse, keyboard nor monitors are peripherals, but rather part of the laptop unit itself. There isn’t a lot of extra space for circulation of air or addition of cards. Not only must laptop components be compact but their heat production must be considerably lower than that of desktop components, and they must conserve considerably more power. Thus the additional cost.
The CPU, also called the microprocessor, works with the laptop’s operating system to control the computer. This CPU is the brain for laptops. In a desktop computer a CPU generates a considerable amount of heat, so it must have a fan and a heat sink. The heat sink is made up of plates, channels and radiator fins that work systematically to draw heat away from the processor.
Laptops have CPUs that run at lower clock speeds and voltage. The heat is reduced, and power is not consumed as greatly, but the processor is slower as a result. Most laptops will run faster and at a voltage that is higher when they run on electricity than when they run on batteries.
Laptop processors don’t use pins to mount to their motherboard, which saves room. The two alternatives are for the processors to mount right to the laptop motherboard without any socket, or to use a micro-FCBGA (Flip Chip Ball Grid Array.) The latter replaces pins with balls. The disadvantage of this, however, is that the owner cannot replace or upgrade the processor because it can’t be removed from the motherboard.
Laptops have slow-down, hibernation or sleep modes. These reduce the speed of the CPU when the laptop is not in use. One Macintosh processor actually prioritizes its data to help minimize the drain on its battery. Some laptops use CPUs made for desktops, but that are designed to run at slower clock speed. Performance is improved in these laptops but they tend to run considerably hotter than other laptops, and their battery life is reduced a great deal.
About The Author
Robert Michael is a writer for http://nhmxservers.com/ which is an excellent place to find Notebooks links, resources and articles. For more information go to: Laptops & Notebooks.
Laptop Guide
Most of us tend to think of laptops in the same way: a fairly small portable computer that can open and close like a suitcase, with all of the capabilities of a desktop. In fact, the term “laptop” is really very generic. There are currently four main styles of these portable PCs, each offering something a bit different, depending upon your specific needs.
- Ultralights – Also known as sub-notebooks or ultraportables, this style of laptop weighs up to – but no more than – four pounds, making them ideal for travelers. The upside of an ultralight is that it doesn’t burden those who have to spend a lot of time carrying them with aching muscles, as its larger cousins often do. The downside, however, is that – in order to cut down on the size and weight – this type of laptop is so small that there’s no room for a network card or internal CD drive. In order to reap the benefits of these types of “attachments,” you’d have to bring an external CD drive and port replicator. Another negative in the scenario is that ultralights tend to be on the expensive end of the laptop spectrum.
- Notebooks – This is basically just a regular laptop, but is slightly less heavy, weighing in at four to six pounds. While it’s heavier than the smaller ultralight, it also offers more options with less fuss. Offering the flexibility of a combo bay, notebooks are designed with a large opening on the side which allows the user to plug a CD drive, floppy disk or extra battery – allowing you to access the features that you need without the burden of making room for those that aren’t needed.
- Standards – Commonly referred to as “regular laptops,” these weigh between six and eight pounds and offer a full range of benefits. This technological pack-mule is the best buy – dollar for dollar – when you consider the cost/performance ratio. Due to their popularity, combined with their design and usability, it’s not uncommon to find discounts on these from major manufacturers. Other types of laptops, which fall into more specialized categories, tend to be in the higher price ranges. The bottom line is, of the four main types of laptops, the standard is the most economical for the most reasonable amount of money.
- Extra Large – Although this type of laptop doesn’t yet have a technical name, it’s best to simply refer to it as “extra large,” since they weigh between eight and ten pounds and have a screen that measures at least 17 inches. In addition, the keyboard is much larger than a standard laptop, making it a more comfortable fit for those who find the keyboard of the standard laptop rather inhibitive. There are a couple of downfalls to owning this type of unit, not the least of which includes its weight. There can be a four pound difference between the weight of a standard and an extra large laptop – and that’s quite a bit, when you think about lugging it around all day. The other negative factor is the cost of this type of laptop. It offers a price tag that’s every bit as hefty as its weight and size.
Monday, 29 January 2007
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