vertical gpu mounts. Some used to include holes to support external water cooling radiators. Cases with side windows may have side fans (on the window) as well, although it is uncommon for cases with glass windows to have side fans. Case manufacturers Prominent after-market case manufacturers include Antec, BitFenix, Cooler Master, Corsair, Fractal Design, In Win Development, Lian Li, NZXT Corp., Phanteks, Rosewill, and Thermaltake, (DIY PC) Intrusion detection 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 computers. 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 See also List of computer hardware 3D printing List of computer hardware manufacturers Novena Thermally Advantaged Chassis VIA OpenBook open case design standard. Computer cooling Computer fan References External links Chassis Form Factors