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. 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", "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, 3013. 
  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: http://clicky.me/PriceCasesUS (US) http://clicky.me/PriceCasesUK (UK) htt...

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...

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 ...

How to Choose a PC Case Tutorial :: The Basics

This video covers the fundamentals on what to look for when choosing a pc case. It applies more beginners than experienced builders. We hope you find it info...

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!!

NZXT H440 Quiet PC Case

My review/unboxing of the NZXT H440 is out! I actually really like this case. A LOT. I've spent some more time with it during B-roll shooting and taking the ...

MSI Nightblade Barebones Computer Case

Luke (Slick) took a look at the new Nightblade barebones case from MSI. Can it withstand the ogre treatment? Sponsor link: http://linustechtips.com/vsmpsupro...

Silverstone Cases Showcase with DUSTPROOF Computer Case Linus Tech Tips CES 2013

Not only do we show off Silverstone's new Fortress & Raven cases, but also a prototype spill-proof & dust-proof concept case, and their new dual monitor arm ...

ENERMAX COENUS GUNMETAL GREY ATX MID TOWER COMPUTER CASE Overview - Newegg TV

http://www.newegg.com | Computer Cases: http://bit.ly/1apBri8 sku: 11-124-157 Here's an COENUS GUNMETAL GREY ATX MID TOWER COMPUTER CASE, made by ENERMAX, Mo...

Corsair Air 240 Computer Case

Luke took a look at Corsair Air 240 case - the attractive follow-up to the Air 540. Dollar Shave Club link: http://dollarshaveclub.com/linus (Note: there is not a discount associated with...

1000000 videos foundNext > 

266 news items

 
Hard OCP
Tue, 22 Jul 2014 06:41:15 -0700

The SilverStone Raven series of cases long ago broke the mold when it comes to "normal" computer chassis. Its design execution has always been good and the Ravens' airflow characteristics are excellent. Today SilverStone pushes the new Raven RV05 ...
 
PCWorld (blog)
Mon, 28 Jul 2014 08:00:12 -0700

Open up the computer's case, turn it on, and look around with a flashlight (but try not to touch anything while the computer is on). In all but the lowest-power, passively cooled systems, you'll likely find at least four fans: an intake fan, an exhaust ...
 
Hard OCP
Tue, 22 Jul 2014 10:03:45 -0700

If you like your computer cases with a twist (90º to be exact), make sure you read our evaluation of the SilverStone Raven RV05 rotated computer case. News Image. The SilverStone Raven series of cases long ago broke the mold when it comes to "normal" ...

Hindu Business Line

Hindu Business Line
Sun, 10 Aug 2014 22:40:25 -0700

B. Ramalinga Raju , former Chairman of the scam ridden Satyam Computer, on his way to the Criminal Courts Complex in Hyderabad on Monday. Photo: P.V. Sivakumar. Hyderabad, Aug 11: The special court trying the multi-crore Satyam Computer Services ...
 
Hard OCP
Fri, 15 Aug 2014 10:26:15 -0700

Lots of folks are looking towards a high end desktop computer system with a much smaller footprint. Mini-ITX motherboards have gotten to such a good quality level over the last few years, putting a gaming and overclocking behemoth in a small case is a ...
 
Press-Enterprise
Tue, 19 Aug 2014 17:33:45 -0700

On July 8, she personally delivered the paper in a hard-sided computer case to the Maryland State Archives in Annapolis, where it was accessioned into Special Collections as the Nimrod Collection. It is the third historic item of its type that Caldwell ...
 
Geek
Tue, 19 Aug 2014 08:56:15 -0700

For years now the gadget at the top of my wishlist has been a thermal imaging camera, specifically one from FLIR. In my opinion a thermal camera is something that's just too awesome to not own, and I do enough work with heat producing products (CPUs, ...
 
Tom's Hardware Guide
Fri, 08 Aug 2014 12:19:30 -0700

I couldn't really find a good category for this but I hope I can still get an answer. I am looking to install a side window into my corsair 200r case. I just want to show off everything and get show the red and black theme I have going on. It won't be ...
Loading

Oops, we seem to be having trouble contacting Twitter

Talk About Computer case

You can talk about Computer case with people all over the world in our discussions.

Support Wikipedia

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