Posts Tagged ‘monitor’

Computer Server Accessories

Monday, April 26th, 2010

Servers are the most efficient computers available. Most of them are designed for fast data processing and transmitting, and not for gaming. Even if a server has a graphics card (not necessary in all situations) it’s a very slow one, on-board with 8-32MB of memory, enough for displaying statistics and diagnostic data. Their hard disks on the other hand are very fast, usually 10,000 or 15,000RPM, for very fast and dependable data access. Their memory modules are also different from desktops, they need to be very reliable, meaning that ECC (error correction cycle) RAM is mandatory. For even faster data access, servers also need huge quantities of memory, server motherboard usually support up to 32 memory modules, 4GB each.
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Because servers don’t really need monitors, especially if they are used in groups of 4-128, special computer cases were designed for them called Racks, which come in many different sizes for different destinations. For every such server group it’s sufficient to have one keyboard and one monitor, so a manufacturer called NORCO designed a very special, laptop-like monitor and keyboard that slides in one of the server rack bays, thus saving a lot of space. It doesn’t require any software, the server administrator selects the server unit he wishes to control from a simple on-screen menu, so it’s a very reliable server computer accessory.

Another useful server computer accessory is a special 3.5” hard disk rack that houses two removable 2.5” hard disks. This can be used for lowering hard disk cost by using two 2.5 7200RPM drives instead of one 15000RPM drive, or to improve speed by using two SSDs instead of one 3.5” high-rpm noisy hard drive. It’s made of aluminum and plastic, for optimal cost and durability. For data two S-ATA cables are needed, one for each hard drive, but only one power cable is required, because 2.5” drives have very low power requirements. It also has LED indicators for both power and HDD access, and a practical security lock prevents accidental removal of drives.

To bring down cost even more, RAIDON designed a very useful memory card to S-ATA rack. It fits into a 2.5” hard drive bay and uses to Compact Flash memory cards in RAID 1 or NRAID mode. This is not exclusively a server computer accessory, it also fits into any S-ATA laptop drive bay, improving both performance and battery life. For only $35 + cost of CF cards you can upgrade any S-ATA compatible computer’s hard drive to server-like speed. One of the cheapest and most useful computer accessories is a 5.25” to 3.5” bay converter. Basically it made of 4 pieces of metal and 4 pieces of rubber. One part has to be mounted to the side of the 5.25” bay, and the other one that’s connected with screws (but separated by pieces of anti-vibration rubber) has to be mounted on the 3.5” hard drive. The procedure is the same for the other side too. It costs only $6, but spares you a lot of stress and headaches normally caused by loud variable noises.

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Basic Computer Hardware

Wednesday, February 3rd, 2010

Computer hardware is the physical part of the computer including the digital circuits inside the computer as opposed to the software that carry out the computing instructions. The hardware of a computer is unlikely to change frequently unless due to the crash or for upgrading them. The devices that is capable of storing, executing system instructions and controlling other logical outputs.

Hardware comprises all of the physical part of the computer such as Monitor, CPU, motherboard, ram, CD-Rom, printer, scanner, hard disk, flash drive (AKA pen drive), processor, pci buses, floppy disk, power supply, VGA card, sound card, network interface card, peripherals, joystick, mouse, keyboard, foot pedal, computer fan, camera, headset and others.



CPU (Central Processing Unit): CPU or central processing unit relates to a specific or processor. The performance of the computer is determined by the CPU chip (processor speed) and the other computer circuitry.



Hard Disk Drives – Disk drive is the mechanism to run the disks. All disks need a drive to get the information, read it and put it back to the disks. Hard disk is used to store the data permanently. Often the terms disk and drive used to describe the same thing but it should be clear that a disk is a storage device.



Modem – A modem is used for the modulation and demodulation of the data that is transferred through the modem and the telephone lines. Modem translates the data from digital to analog from analog to digital. Because on the telephone lines data can travel in the form of the analog signals and in the computer data transmits in the form of digital signals. Modems are measured by the speed which is called baud rate.



Video cards-Video cards allow computer to display video, graphics and animation. Some video cards allow computers to display television. A video card with a digital video camera allows users to produce live video. A high speed broadband internet connection is required to watch the videos on net.



Network cards: Network interface cards allow PCs to connect with each other and communicate. Every network computer is required to have a NIC card. NIC cards are required both in wired and wireless networking.



RAM (Random Access Memory) RAM is a memory that is being used by the computer to store the information temporarily. For example when some work is performed on some applications that work is temporarily stored in the RAM. More RAM in the computer more faster computer works.



Cards – Cards are the hardware components that are added to the computer to increase their functionalities and capabilities.

Memory – Memory is the one of the important piece of the hardware. Sometimes memory chip memory is confused with the hard disk memory. Sometimes unallocated space of the hard disk is used as virtual memory also known as page file. This type of memory is a temporary memory and is used actual memory is less and requires some additional memory to perform a specific task.

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Computer And Its Parts

Wednesday, February 3rd, 2010

If you use a desktop computer, you might already know that there isn’t any single part called the “computer.” A computer is really a system of many parts working together. The physical parts, which you can see and touch, are collectively called hardware. Software, on the other hand, refers to the instructions, or programs, that tell the hardware what to do.

The illustration above shows the most common hardware in a desktop computer system. Your system may look a little different, but it probably has most of these parts. A laptop computer has similar parts but combines them into a single notebook-sized package.


The system unit is the core of a computer system. Usually it’s a rectangular box placed on or underneath your desk. Inside this box are many electronic components that process information. The most important of these components is the central processing unit (CPU), or microprocessor, which acts as the “brain” of your computer. Another component is random access memory (RAM), which temporarily stores information that the CPU uses while the computer is on. The information stored in RAM is erased when the computer is turned off.



A mouse is a small device used to point to and select items on your computer screen. Although mice come in many shapes, the typical mouse does look a bit like an actual mouse. It’s small, oblong, and connected to the system unit by a long wire that resembles a tail. Some newer mice are wireless. A mouse usually has two buttons: a primary button (usually the left button) and a secondary button. Many mice also have a wheel between the two buttons, which allows you to scroll smoothly through screens of information.



A keyboard is used mainly for typing text into your computer. Like the keyboard on a typewriter, it has keys for letters and numbers, but it also has special keys. The function keys, found on the top row, perform different functions depending on where they are used. The numeric keypad, located on the right side of most keyboards, allows you to enter numbers quickly. The navigation keys, such as the arrow keys, allow you to move your position within a document or webpage.

A monitor displays information in visual form, using text and graphics. The portion of the monitor that displays the information is called the screen. Like a television screen, a computer screen can show still or moving pictures.

There are two basic types of monitors: CRT (cathode ray tube) monitors and LCD (liquid crystal display) monitors. Both types produce sharp images, but LCD monitors have the advantage of being much thinner and lighter. CRT monitors, however, are generally more affordable.




Speakers are used to play sound. They may be built into the system unit or connected with cables. Speakers allow you to listen to music and hear sound effects from your computer.

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