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Computer Hardware

Computer Hardware. A General Overview. Power Supply. The “heart” of the computer. Sole purpose is to distribute power to other hardware. Measured in W (watts). Computer won’t boot if wattage is too low. Failure usually attributed to fan.

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Computer Hardware

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  1. Computer Hardware A General Overview

  2. Power Supply • The “heart” of the computer. • Sole purpose is to distribute power to other hardware. • Measured in W (watts). • Computer won’t boot if wattage is too low. • Failure usually attributed to fan. • Replacing power supply can fix many broken computers. • Connects to each major component individually, thus requiring multiple connectors and wattage specifications.

  3. CPU: Central Processing Unit • The “brain” of the computer. • Sometimes has memory, but stores no information long-term. • Measured in MHz or GHz (Megahertz/Gigahertz), which equates to processing speed. • Single or multiple cores (more cores means more “thinking” at one time).

  4. RAM Sticks: Random Access Memory Sticks • The “short-term” memory of the computer. • Store no information long-term. • Measured in KB, MB, & GB (Kilobytes, Megabytes, & Gigabytes). • Removable and usually expandable, meaning multiple slots available for more sticks. • Affect the Computer’s processing speed.

  5. Graphics Card • Own CPU, RAM, &, sometimes, fan. • Connects to monitor, TV, and/or projector displays. • Internal processing speed determines quality of picture and video on display. • Some can support more than one display at a time. • Some have inputs for video cameras.

  6. Hard Drives • The “long-term” memory, or storage, of the computer. • Measured in bytes (KB=1024 bytes; MB=1024 KB; GB=1024 MB; Terabyte, or TB=1024 GB) • Internal or external. • Must scrub to truly delete information. • Partitions create multiple virtual drives. • Have greatest evidentiary value.

  7. Optical Drives • ROM (read only memory) • Also measured in bytes (GB being the highest yet) • Read and/or burn CD’s, Minidisks, DVD’s, or Blu Ray discs with a LASER. • Have no memory in and of themselves – need disk to function. • Information on disks typically lasts for many years, depending on physical condition.

  8. Other Memory Storage Devices: From Most to Least Common Memory Cards Tape Drives Floppy Disk Drives Thumb/USB/Flash Drives Zip Drives Jaz Drives External Hard Drives

  9. References Power Supply JPG taken from ATXPowerSupplies.com:http://www.atxpowersupplies.com/250-watt-power-supply-FSP250-60ATV-1A.php . retrieved June 24, 2011, using Google image search: power supply CPU JPG take from Geekstogo.com: http://www.geekstogo.com/do-you-need-a-quad-core-cpu/ . retrieved June 23, 2011, using Google image search: ram stick RAM JPG taken from Geeks.com: http://www.geeks.com/techtips/2008/techtips-27APR08.htm . retrieved June 23, 2011, using Google image search: CPU Graphics JPG taken from HowStuffWorks.com, A Discovery Company: http://computer.howstuffworks.com/graphics-card2.htm . retrieved June 24, 2011, using Google image search: graphics card harddrive JPG taken from Madshrimp: http://www.madshrimps.be/articles/article/609/Ultra-Grid-ATX-Mid-Tower-Case-Review/3#axzz1QGxN8vFo . retrieved June 25, 2011, using Google image search: hard drive in tower optical jpg taken from Lenovo, 2010: http://www-307.ibm.com/pc/support/site.wss/MIGR-4TNTTA.html . retrieved June 25, 2011, using Google image search: optical drive memory card variety JPG take from PK Photography Blog: http://www.pkphotographyblog.us/2009/06/memorycards/ . retrieved June 25, 2011, using Google image search: variety of memory cards thumbs JPG taken from DT's Flash Drive Blog: http://www.usbmemorysticks.net/bulk-flash-drives . retrieved June 25, 2011, using Google image search: variety of thumb drives external JPG take from Hard Drive Portable: http://harddriveportable.net/cheap-external-hard-drives/ . retrieved June 25, 2011, using Google image search: external hard drive floppy JPG taiken from RUANQU.NET, Supplierlist.com Online B2B: http://www.supplierlist.com/product_view/rvunion/148446/100618/Floppy_Disk_Drive.htm . retrieved June 25, 2011, using Google image search: floppy disk drives tape drives JPG taken from Tom's Hardware, Bestofmedia: http://www.tomshardware.com/reviews/backing-tape-drives,593.html . retrieved June 25, 2011, using google image search: tape drives for backup Zipdrive JPG taken from MWolk blog: http://mwolk.com/blog/choose-zip-drive/ . retrieved June 25, 2011, using Google image search: zip drives jazdrive JPG taken from MaximumPC, Future USA Inc.: http://www.maximumpc.com/article/news/computer_data_storage_through_ages?page=0,3 . retrieved June 25, 2011, using google image search: jaz drives

  10. Hardman Productions

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