ENCLOSURES

ENCLOSURES

  Term often associated with computer hard drives, however, can be used to describe any  box that holds a computer peripheral such as a hard drive. The picture is an example of an Adaptec  hard drive enclosure that could be used to connect a laptop hard drive to a desktop computer. These enclosures can be purchased online or at any local computer retail store

there   are three general classifications of case :baby ,desktop, and tower

Baby Cases

The baby  case lives up to its name . it is a small desktop case that fits an absolute minimum or items. you’re usually limited to two drive, because the 130-175w  power supply is typically located  right behind the drivers , and no room left for an internally mounted hard drive . you are also limited to using a small motherboard ---typically with a minimum of features or ports . finally ,the small case and motherboard will usually limit the number of expansion slots available .

 Desktop

Desktop cases come in a variety of shapes and sizes , but generally offers a lot more versatility and upgrade potential then baby cases . with regular desktop cases you can usually count on two external drive bays and two internal drive  bays –great for a floopy drive ,Cd or DVD drive and one or two hard drive s. if you find a desktop case with three external drive bays , you can even add a second CD drive  or a tape drive .the other advantages to regular desktop cases is that they have the physical space to support large power supplies (usually 200-250w +),they fit larger motherboards , and they support more expansion cards .

Tower Cases

The tower case is typically a large vertically mounted cases, which is designed to hold the maximum number of drives .there are often four or more external drives bays, and at least four internal drive bays . the extra space also allows the largest power supplies (300w+)which are vital to support an array of different drives .Tower cases can hold the very largest of motherboards (though in practice the mother boards are rarely  larger then those found in a regular desktop ) Tower cases also provide the best air ventilation and can support two or more fans and air filters . the other advantage of a good airflow  is that  high –end CPUs (even multiprocessor mother boards) can be cooled most effectively .

SMPS

Short for Switched-Mode Power Supply, SMPS is a power supply that uses a switching regulator to control and stabilize the output voltage by switching the load current on and off. These power supplies offer a greater power conversion and reduce the overall power loss.