Storage capacity determines how much information can be stored for later use. More hard disk space means you can store more programs and data. In modern PCs it is measured in Gigabytes (GB) but are reaching up to Terabytes (TB).
Hard disk speed is normally expressed in revolutions per minute (rpm). The rpm is how fast the disk is spinning and varies from 5400 rpm – 15000 rpm.
Other specifications
- Ports: A computer system need to send and receive information from peripheral devices. Aport is a piece of technology that is used to connect external devices to a computer.
- Parallel: used mainly to connect printers but can also be used to connect certain scanners and external hard disks.
- Serial: Used to connect certain types of mouse, modem and printers.
- Universal Serial Bus (USB) Used to connect around 127 devices including printers, scanners, flash drives and digital cameras. There are USB-1 and USB-2 (this one is faster).
- Firewire/IEEE 1394: used to transfer video images from digital devices.
Expansion Slots
Expansion slots are sockets found on the motherboard and are used to insert additional circuit boards (cards). They can be used for adding more memory, graphics facilities and other special devices. There are three types of expansion slots:
1) Peripheral Component Interconnect (PCI) – used to attach sound cards, network cards and video cards.
2) Accelerated Graphics Port (AGP) – mainly used for graphics cards
3)Industry Standard Architecture (ISA) – used for attaching modems and not commonly seen on most modern computers
Determining feasibility
As stated above the system specifications must be tested for feasibility. A feasibility is an analysis of how successfully the installation can be completed, using the specifications of the computer system.
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