digplanet beta 1: Athena
Share digplanet:

Agriculture

Applied sciences

Arts

Belief

Business

Chronology

Culture

Education

Environment

Geography

Health

History

Humanities

Language

Law

Life

Mathematics

Nature

People

Politics

Science

Society

Technology

An ATX desktop case lying on its side, the rear facing the camera. The motherboard will lie flat on the bottom, against the right panel, with peripheral connectors protruding through the rear panel, drive bays at the top and front, and the power supply at the top and rear.

A computer case also known as a computer chassis, tower, system unit, cabinet, base unit or simply case and sometimes incorrectly referred to as the "CPU" or "hard drive",[1][2] is the enclosure that contains most of the components of a computer (usually excluding the display, keyboard and mouse).

Cases are usually constructed from steel (often SECC — Steel, electrogalvanized, cold-rolled, coil) or aluminium. Plastic is sometimes used, and other materials such as glass, wood and even Lego blocks have appeared in home-built cases.

Sizes[edit]

Cases can come in many different sizes (known as form factors). The size and shape of a computer case is usually determined by the form factor of the motherboard, since it is the largest component of most computers. Consequently, personal computer form factors typically specify only the internal dimensions and layout of the case. Form factors for rack-mounted and blade servers may include precise external dimensions as well, since these cases must themselves fit in specific enclosures.

For example, a case designed for an ATX motherboard and power supply may take on several external forms, such as a vertical tower (designed to sit on the floor, height > width) or a flat desktop (height < width) or pizza box (height ≤ 5 cm (2 in), designed to sit on the desk under the computer's monitor). Full-size tower cases are typically larger in volume than desktop cases, with more room for drive bays and expansion slots. Desktop cases—and mini-tower cases under about 46 cm (18 in) high—are popular in business environments where space is at a premium.[3]

Currently, the most popular form factor for desktop computers is ATX, although microATX and small form factors have also become very popular for a variety of uses. In the high-end segment the unofficial and loosely defined XL-ATX spec appeared around 2009. XL-ATX extends the length of the Mainboard to accommodate 4 graphics cards with dual-slot coolers. Some XL-ATX mainboards increase the Mainboard's width as well, to allow more space for the CPU and Memory PWM, and in some cases a second CPU socket. While the market share of these exotic high-end mainboards is very low, almost all high-end cases and many mainstream cases support XL-ATX (10 expansion slots). Companies like In Win Development, Shuttle Inc. and AOpen originally popularized small cases, for which FlexATX was the most common[dubious ] motherboard size. As of 2010 Mini ITX has widely replaced FlexATX as the most common small form factor Mainboard standard. The latest mini ITX mainboards from Asus, Gigabyte, Zotac and Foxconn offer the same feature set as full size mainboards. High-end mini ITX mainboards support standard desktop CPUs, use standard memory DIMM sockets and feature a full size pciE 16x slot with support for the fastest graphics cards. This allows customers to build a fully fledged high-end computer in a significantly smaller case. Apple Inc. has also produced the Mac Mini computer, which is similar in size to a standard CD-ROM drive.

Tower cases are often categorized as mini-tower, mid-tower or full-tower. Full tower cases are typically 56 cm (22 in) or more in height and intended to stand on the floor. They have anywhere from six to ten externally accessible drive bays. The ratio of external to internal bays is shifting, however, as computing technology moves from floppy disks and CD-ROMs to large capacity hard drives, USB flash drives, and network-based solutions. The full tower case was developed to house file servers which would typically be tasked with serving data from expensive CD-ROM databases which held more data than the hard drives commonly available. Hence many full tower cases include locking doors and other physical security features to prevent the theft of the discs. Midtower cases are smaller, about 46 cm (18 in) high with two to four external bays. A minitower case will typically have only one or two external bays and stand from 36 cm (14 in) to 41 cm (16 in) tall. In 2012 CoolerMaster introduced the Cosmos II "ULTRA-Tower" case, standing 71 cm (28 in) tall and featuring 16 drive bays.[4][5] This is a high-end case intended for desktop systems and doesn't include security features.

Layout[edit]

Computer cases usually include sheet metal enclosures for a power supply unit and drive bays, as well as a rear panel that can accommodate peripheral connectors protruding from the motherboard and expansion slots. Most cases also have a power button or switch, a reset button, and LEDs to indicate power status as well as hard drive[citation needed] and network activity (in some models). Some cases include built-in I/O ports (such as USB and headphone ports) on the front of the case. Such a case will also include the wires needed to connect these ports, switches and indicators to the motherboard.

Major component locations[edit]

  • The motherboard is usually screwed to the case along its largest face, which could be the bottom or the side of the case depending on the form factor and orientation.
  • Form factors such as ATX provide a back panel with cut-out holes to expose I/O ports provided by integrated peripherals, as well as expansion slots which may optionally expose additional ports provided by expansion cards.
  • The power supply unit is often housed at the bottom or top rear of the case; it is usually attached with four screws to support its weight.
  • Most cases include drive bays on the front of the case; a typical ATX case includes both 5.25" and 3.5" bays. In modern computers, the former are used mainly for optical drives, while the latter are used for hard drives, floppy drives, and card readers.
  • Buttons and LEDs are typically located on the front of the case; some cases include additional I/O ports, temperature and processor speed monitors in the same area.
  • Vents are often found on the front, back, and sometimes on the side of the case to allow cooling fans to be mounted via surrounding threaded screw holes.

Internal access[edit]

Tower cases have either a single side panel which may be removed in order to access the internal components or a large cover that saddles the chassis. Traditionally, most computer cases required computer case screws to hold components and panels in place (i.e. motherboard, PSU, drives, and expansion cards). From the 2000s there is a trend towards tool-less cases, in which components are held together with snap-in plastic rails, thumbscrews, and other methods that do not require tools; this facilitates quick assembly and modification of computer hardware.

Appearance[edit]

Further information: Case modding

Through the 1990s, most computer cases had simple rectangular shapes, and were often painted beige or white with little attention given to visual design. Beige box designs are still found on a large number of budget computers assembled from generic components. This class of machines is still known as white box computers.

Case modding is the artistic styling of computer cases, often to draw attention to the use of advanced or unusual components. Since the early 2000s, some cases have included clear side panels or acrylic windows so that users can look inside while it is operating. Modded cases may also include internal lighting, custom paint, or liquid cooling systems. Some hobbyists build custom cases from raw materials like aluminum, steel, styrofoam, acrylic, or wood.

Case manufacturers[edit]

Prominent after-market case manufacturers include Antec, AOpen, Chieftec, Cooler Master, Corsair, In Win Development, IXIUM, Lian Li, NZXT Corp., Shuttle Inc., SilverStone Technology, Thermaltake, iStarUSA Group and Zalman.

Intrusion detection[edit]

Some computer cases include a biased switch (push-button) which connects to the motherboard. When the case is opened, the switch position changes and the system records this change. The system's firmware or BIOS may be configured to report this event the next time it is powered on.

This physical intrusion detection system may help computer owners detect tampering with their computer. However, most such systems are quite simple in construction; a knowledgeable intruder can open the case or modify its contents without triggering the switch.

In the past, many tower cases intended to house file servers featured a locking door covering the external drive bays. This was a security feature intended to prevent the theft of the CD-ROM discs the drives would be holding. At the time, CD-ROM capacity was larger than the hard disks available, and many business-critical databases were distributed on this media. These databases were often very expensive or held proprietary data, and hence would be likely targets for casual theft.

Gallery[edit]

See also[edit]

References[edit]

  1. ^ Tadeo, Aaron (January 13, 2011). "The CPU Versus the Computer Tower Case". Yahoo! Voices. Yahoo!. Retrieved October 25, 2013. 
  2. ^ "Don’t call a computer a hard drive". One Technical. December 28, 2005. Retrieved October 25, 2013. 
  3. ^ "Reference Guide - Case - Styles". PCGuide. Retrieved 2013-09-28. 
  4. ^ "Cooler Master – Cosmos II". Cooler Master. Retrieved September 28, 2013. 
  5. ^ "CoolerMaster Cosmos II Ultra Tower Case Review". Overclockers. January 27, 2012. Retrieved September 28, 2013. 

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Computer_case — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
1000000 videos foundNext > 

Top Ten Computer Cases 2014 | Best Computer Case Review

See the full list at http://ezvid.com/toptencomputercases Pricing and Availability: PriceCasesUS PriceCasesUK PriceCasesCA made with ezvid, free download at http://ezvid.com.

Corsair Graphite 760T PC Computer Case

Our review of the Corsair Graphite 760T contains a little bit of "unboxing" action, but otherwise focuses on the ease of use and features of this absolutely ...

Computer Case Upgrade! & New Controller! (Also bad news)

Videos will return tomorrow. Sorry about that. Subscribe: http://www.youtube.com/subscription_center?add_user=WhyBeAre.

NZXT S340 Computer Case - Stuff That Doesn't Suck Episode 3

I have received a TON of requests lately for a review of the NZXT S340. So here it is - is this affordable case as exciting and revolutionary as NZXT's promo...

Bitfenix Ghost Quiet Gaming Computer Case Unboxing & First Look Linus Tech Tips

Bitfenix has been releasing one hit product after another these days. Between the Shinobi, Shinobi XL, and Prodigy you can buy any size of gaming machine, bu...

What's a Computer Case? Newegg TV's Tutorial and Shopping Guide

http://www.newegg.com | Computer Cases: http://bit.ly/1ticFgS Mid-Tower? Full-Tower? Micro or Mini-Atx? Itx? Chassis? Ever wonder what all that means? Here a...

Top Ten Computer Cases 2015 | Best Computer Case Review

More Info & Pics: https://ezvid.com/toptencomputercases Pricing and Availability:http://clicky.me/7u26 (US) http://clicky.me/7u27 (UK) | http://clicky.me/7u2...

Antec Lanboy Air Ultimate Airflow Modular Computer Case Unboxing & First Look Linus Tech Tips

http://ncix.com/search/?categoryid=0&q=lanboy+air This case is actually so much cooler in person than it looks in pictures. It can also hold up to 15 fans!!

BitFenix Pandora Computer Case

The BitFenix Pandora is a gorgeous case, but it is certainly not without fault... Are its good looks and ambitious design enough to justify the issues you mi...

Rosewill RISE & RISE Glow Computer Case Overview - Newegg TV

http://www.newegg.com |Computer Cases: RISE http://bit.ly/1ADK5JY sku: 11-147-226 RISE GLOW http://bit.ly/1ADKkVt sku: 11-147-227 Here are computer cases, ma...

1000000 videos foundNext > 

5915 news items

 
Tom's Hardware
Thu, 18 Dec 2014 05:48:20 -0800

I usually use my computer case, connecting it to something metallic. If I use a wrist strap at all, mostly I don't. Mostly I just touch my computer case with both hands and off I go. I like to pull the PSU from the wall. So nothing is powered on while ...

Fast Company

Fast Company
Wed, 10 Dec 2014 08:52:30 -0800

Strictly a software guy for most of his youth, Steindler had only dabbled in physical making, when he custom designed a computer case to show off at LAN parties. But as Olark began to take off, Steindler, too, felt a need to build physical stuff. He ...

Cult of Mac

Cult of Mac
Tue, 09 Dec 2014 04:02:12 -0800

With your motherboard, you should have received an I/O shield, which you'll need to place into the large gap in the back of your computer case now. If you're using the PC Mate motherboard I've chosen, ensure the round PS2 ports are at the top and the ...

Richmond Register

Richmond Register
Mon, 15 Dec 2014 22:33:45 -0800

They included a pink Taurus .380 caliber pistol, model PT78 serial #25342A, a MacBook laptop computer, modelA1181, serial #W87135KVWGM, an Olympus digital camera, a stainless-steel survival knife and a black Dell computer case. They were valued ...

Tech Times

Tech Times
Thu, 27 Nov 2014 13:00:00 -0800

Building a computer has long been the choice of people who either don't want to shell out the cash for a new computer or who have a specific idea about what kind of parts they want. Here is a step-by-step video guide on how to build your own PC.
 
Inside Higher Ed (blog)
Thu, 11 Dec 2014 16:22:30 -0800

iFixit guides and tools can help you replace a dead battery, a cracked computer case, a shattered phone screen, and an old hard drive. For computer parts and repairs, a website like Crucial can help you find the compatible computer parts for your ...

Daily Mail

Daily Mail
Wed, 17 Dec 2014 18:27:49 -0800

The 17-year-old sported a knee brace as her elder brother Trevor gave her a helping hand as they left the terminal. Although Chloe has not stated publicly how she injured her leg, speculation has pointed to stunt-work on her current film project, The ...
 
Tom's Hardware
Wed, 10 Dec 2014 20:39:06 -0800

I'm installing an MSI X99S Gaming 7 mobo and it has a connector called "JAUD1: Front Panel Audio Connector" which further says, "This connector allows you to connect the front audio panel located on your computer case. This connector is compliant with ...
Loading

Oops, we seem to be having trouble contacting Twitter

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!

Searchlight Group

Digplanet also receives support from Searchlight Group. Visit Searchlight