...eir on skin a very important body organ. hile the case isnt as critical to the system as some other computer components like the processor or hard disk, it has several important roles to play in the functioning of a properly-designed and ell-built computer. The case doesnt appear to perform any function at all, at first glance. Hoever, this isnt true the case is in fact much more than just a box. The case has a role to play in several important areas Structure The motherboard mounts into the case, and all the other internal components mount into either the motherboard or the case itself. The case must provide a solid structural frameork for these components to ensure that everything fits together and orks ell. Protection The case protects the inside of your system from the outside orld, and vice-versa. Vice versa Yes, although most people dont think about that. ith a good case, the inside of your computer is protected from physical damage, foreign objects and electrical interference. Everything outside of your computer is protected from noise created by the components inside the box, and electrical interference as ell. In particular, your systems poer supply, due to ho it orks, generates a good deal of radio-frequency RF interference, hich ithout a case could reak havoc on other electronic devices nearby. Cooling Components that run cool last longer and give much less trouble to their oner. Cooling problems dont announce themselves you ont get a System Cooling Error on your screen, youll get random-seeming lockups and glitches ith various parts of your system. Youll also have peripherals and drives failing months or years before they do on your friends computer, and youll never even dream that poor cooling is the cause. Making sure that your system is cooled properly is one good ay to save yourself time, trouble and money.Note A spacious, ell laid-out case is a critical part of proper system cooling. Small cases require components to be packed close together, hich reduces cooling in to ays. First, air-flo through the case is reduced because it is blocked by the components. Second, the parts are closer together so there is less space for heat to radiate aay from the devices that are generating it.Organization and Expandability The case is key to a physical system organization that makes sense. If you ant to add a hard disk, CD-ROM, tape backup or other internal device to your PC, the case is here it goes. If your case is poorly designed or too small, your upgrade or expansion options ill be limited. Aesthetics The system case is hat people see hen they look at your computer. For some people this isnt important at all for others its essential that their machine look good, or at least fit somehat into their decor. In an office environment, PCs that all look different can give a ork center a hodge-podge appearance that some consider unprofessional, for example. Status Display The case contains lights that give the user information about hat is going on inside the box not a lot, but some. Some of these are built into the case and others are part of the devices that are mounted into the case. In terms of its actual operation, the case doesnt of course do a lot. It does have sitches and the above-mentioned status lights.PoerYour computer is obviously an electronic device, and its many components of course require poer. Like the case, most people dont give much thought to the poer supplied to the system. The poer supply in your PC can be compared to the officials at a football game if they are doing their jobs properly nobody really notices them, but if they arent, everybody knos it and lets them kno about it.There are to aspects to poer in the PC External Poer External poer refers to the poer that is delivered to the back of the system case. There are several considerations regarding this poer and ho it is supplied that ill determine if your internal poer supply is going to ork the ay it should. Poer Supply The poer supply is the small box that sits inside your case and takes the external poer you supply to the computer. Its main job is to transform this poer into a form the rest of the computer can use. The Poer SupplyThe internal poer supply is responsible for converting your standard household poer into a form that your computer can use. The poer supply is responsible for poering every device in your computer if it has a problem or is of lo quality you may experience many difficulties ith your PC that you may not realize are actually the fault of the electrical system. The poer supply plays an important role in the folloing areas of your system Stability A high quality poer supply ith sufficient capacity to meet the demands of your computer ill provide years of stable poer for your PC. A poor quality or overloaded poer supply ill cause all sorts of glitches that are particularly insidious, because the problems occur in other, seemingly unrelated, parts of the system. For example, poer supplies can cause system crashes, can make hard disks develop bad sectors, or cause softare bugs to appear, problems hich can be very difficult to trace back to the poer supply. Cooling The poer supply contains the main fan that controls the flo of air through the PC case. This fan is obviously a major component in your PCs cooling system. Energy Efficiency Neer PC poer supplies ork ith your computers components and softare to reduce the amount of poer they consume hen at a idle. This can lead to significant savings over older systems. Expandability The capacity of your poer supply is one factor that ill determine your ability to add ne drives to your system, or upgrade to a more poerful motherboard or processor. If you build a ne system ith a poer supply that barely meets your needs, you may have to replace it hen you upgrade don the road. Motherboard and System DevicesThe motherboard is the base of the modern computer system. If the processor is the brain of the computer, then the motherboard is the central nervous system and circulatory system, plus much more, all rolled into one. Here are the main parts of the motherboard and its related devices Motherboard Abit BD7-II Intel 845E Socket 478 ATX The motherboard is the main circuit board in the computer here everything comes together. This is here you plug in your processor, memory, cache, video card and other cards. It is also here you connect your peripherals. System Chipset and Controllers The chipset and other motherboard circuitry are the smarts of the motherboard. Their job is to direct traffic and control the flo of information inside the computer. These circuits control the processors access to memory, the flo of data to and from peripheral devices and communications lines, and much more. The chipset is a critical part of any computer, because it plays a big role in determining hat sorts of features the computer can support. For example, hich processors you can use, hich types of memory, ho fast you can run the machine, and hat...
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