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Sunday, 4 October 2009

How to find the best motherboard .... Motherboard Selection Guide


After reading this, You will get a fair idea about the motherboard and its various components.

Before you buy a motherboard, you should decide which CPU you’re going to buy.

The Socket

The socket on the motherboard supports the cpu. Intel and AMD use different types of sockets. Intel uses Land Grid Array (LGA) and AMD uses Pin Grid Array (PGA).
Socket 775 and socket 1156, 1366 are the most common sockets for Intel processors (as of now). Socket 1156 is the latest one which offers
support to the Core series (i3,i5,i7) processors.
Socket AM2+ and AM3 are the common AMD sockets. AM3 is the latest model that offers support to CPUs like Phenom II.

Bus Speed

The Front Side Bus (FSB) is a system that connects the cpu to the northbridge. The northbridge contacts the memory (RAM) and other components and passes the data to the cpu. The speed of the FSB plays a very important role in the overall performance of a computer. So choose a motherboard with a high speed FSB. This will enable you to install a faster cpu in the future, if needed. Overclocking is another advantage which I’m not going to cover here.

The Chipset

The north-bridge and the south-bridge together constitute the chipset. The
north-bridge is the more important component as it is more involved with the cpu. The chipset plays a major role in the graphics performance of machines without graphics cards, as it accommodates the IGP (integrated/onboard graphics processor). Other functions include memory controller (regulates communication between the CPU and RAM), graphics controller (handles communication between graphics card and CPU), onboard audio etc. So try to buy a motherboard that has a good chipset. Go to a manufacturer’s website and you will be able to find the chipset that suits your needs.
Most part of the above paragraph doesn’t hold true for the high end models of core series CPUs from Intel (i series). The GPU (Graphics Processing Unit), memory controller and the graphics controller are integrated the to CPU’s die itself!
AMD had moved the memory controller to the cpu die a long time ago. But nothing much has happened since.

Memory Slots

It is into the memory slot that you insert the RAM. DDR, DDR2 and DDR 3 are the three types of RAM that are in use today and DDR3 is the fastest of them all. The type of RAM which the motherboard uses will be specified in the manual itself. A slot can accept only one type of RAM. Always go for the motherboard that supports the latest RAM module. No. of slots and max. memory support are the two other factors. That is not very relevant for a desktop user as most of the boards these days have at least 4 slots and can support a minimum of 4 GB which is more than enough. If you’re a pro. gamer or somebody who frequently uses memory intensive programs, you may consider these 2 factors also.


Peripheral Interfaces

As you know, all the peripherals of  a computer are connected to
the motherboard. There are ports inside and outside the motherboard to which we connect the peripherals.

Different types of ports are described below:

IDE port
: predecessor of SATA port. Used for connecting optical drives,HDD.

SATA port: a lot quicker than PATA. Used in all modern systems.

FDD port: Floppy disk drives are not used anymore (normally) but many motherboards still come with an FDD port. Maybe for advanced users. But even bios flashing is too easy these days so you need not worry about it.

USB port    : Generally used for connecting external devices viz. pen drives, external hdd, printers to the pc. USB 3.0 is the latest . Make sure that you buy a board that supports USB 3.0. It’s about 10x faster than USB 2.0.       


FireWire port:

Very similar to USB, but offers better speed (not on paper but in reality) and networking capabilities. Almost all the modern motherboards come with a firewire (IEEE 1394) port.
Other ones like parallel port, serial port etc are standard across all motherboards.

Expansion slots:
These are the array of slots located on the south and central part of the board. You will generally see only 3 types of expansion slots theses days : PCI, PCI x1 express and PCI x16 express slots. The PCI slot houses devices like LAN card, sound card etc., the PCI x1 express is not commonly used. Certain TV tuner cards and graphics use it. PCI x16 express slot is used by graphics cards. Make sure that you have at least two PCI slots and one PCI x16 express slot on your motherboard.
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Thursday, 25 June 2009

Better overview on the typical computer hardware.


Typical PC hardware
  


Hardware of Personal Computer.
Inside a custom computer.

Though a PC comes in many different form factors, a typical personal computer consists of a case or chassis in a tower shape (desktop) and the following parts:
Motherboard
The motherboard is the "brain" of the computer. Components directly attached to the motherboard include:
  • The central processing unit (CPU) performs most of the calculations which enable a computer to function, and is sometimes referred to as the "brain" of the computer. It is usually cooled by a heat sink and fan.
  • The chipset mediates communication between the CPU and the other components of the system, including main memory.
  • RAM Stores all running processes (applications) and the current running OS. RAM Stands for Random Access Memory
  • The BIOS includes boot firmware and power management. The Basic Input Output System tasks are handled by operating system drivers.
  • Internal Buses connect the CPU to various internal components and to expansion cards for graphics and sound.
    • Current
      • The Northbridge memory controller, for RAM and PCI Express
      • PCI, for other expansion cards (Various I/O Ports)
      • SATA for disk drives
    • Obsolete
      • ATA (superseded by SATA)
      • AGP (superseded by PCI Express)
      • VLB VESA Local Bus (superseded by AGP)
      • ISA (expansion slot format,  still used in industrial computers)

  • External Bus Controllers support ports for external peripherals. These ports may be controlled directly by the Southbridge I/O controller or based on expansion cards attached to the motherboard through the PCI bus.
Power supply
Includes power cord, switch, and cooling fan. Supplies power at appropriate voltages to the motherboard and internal disk drives. It also converts AC to DC and provides different voltages to different parts of the computer.
Video display controller
Main article: Graphics card
Produces the output for the visual display unit. This will either be built into the motherboard or attached in its own separate slot (PCI, PCI-E, PCI-E 2.0, or AGP), in the form of a graphics card.
Removable media devices
Main article: Computer storage
  • CD (compact disc) - the most common type of removable media, suitable for music and data.
    • CD-ROM Drive - a device used for reading data from a CD.
    • CD Writer - a device used for both reading and writing data to and from a CD.
  • DVD (digital versatile disc) - a popular type of removable media that is the same dimensions as a CD but stores up to 12 times as much information. It is the most common way of transferring digital video, and is popular for data storage.
    • DVD-ROM Drive - a device used for reading data from a DVD.
    • DVD Writer - a device used for both reading and writing data to and from a DVD.
    • DVD-RAM Drive - a device used for rapid writing and reading of data from a special type of DVD.
  • Blu-ray Disc - a high-density optical disc format for data and high-definition video. Can store 70 times as much information as a CD.
    • BD-ROM Drive - a device used for reading data from a Blu-ray disc.
    • BD Writer - a device used for both reading and writing data to and from a Blu-ray disc.
  • HD DVD - a discontinued competitor to the Blu-ray format.
  • Floppy disk - an outdated storage device consisting of a thin disk of a flexible magnetic storage medium. Used today mainly for loading RAID drivers.
  • Zip drive - an outdated medium-capacity removable disk storage system, first introduced by Iomega in 1994.
  • USB flash drive - a flash memory data storage device integrated with a USB interface, typically small, lightweight, removable, and rewritable. Capacities vary, from hundreds of megabytes (in the same ballpark as CDs) to tens of gigabytes (surpassing, at great expense, Blu-ray discs).
  • Tape drive - a device that reads and writes data on a magnetic tape, used for long term storage and backups.
Internal storage
Hardware that keeps data inside the computer for later use and remains persistent even when the computer has no power.
  • Hard disk - for medium-term storage of data.
  • Solid-state drive - a device similar to hard disk, but containing no moving parts and stores data in a digital format.
  • RAID array controller - a device to manage several internal or external hard disks and optionally some peripherals in order to achieve performance or reliability improvement in what is called a RAID array.
Sound card
Main article: Sound card
Enables the computer to output sound to audio devices, as well as accept input from a microphone. Most modern computers have sound cards built-in to the motherboard, though it is common for a user to install a separate sound card as an upgrade. Most sound cards, either built-in or added, have surround sound capabilities.
  
  
Other peripherals
Main article: Peripheral
In addition, hardware devices can include external components of a computer system. The following are either standard or very common, it includes various input and output devices, usually external to the computer system.
Input
Main article: Input
  • Text input devices
    • Keyboard - a device to input text and characters by depressing buttons (referred to as keys), similar to a typewriter. The most common English-language key layout is the QWERTY layout.
  • Pointing devices
    • Ball Mouse - a pointing device that detects two dimensional motion relative to its supporting surface.
    • Optical Mouse - a newer technology that uses lasers, or more commonly LEDs to track the surface under the mouse to determine motion of the mouse, to be translated into mouse movements on the screen.
    • Trackball - a pointing device consisting of an exposed protruding ball housed in a socket that detects rotation about two axes.
    • Track pad – a pointing device that s surface & move the cursor is with finger, Commonly used in Laptops
  • Gaming devices
    • Joystick - a general control device that consists of a handheld stick that pivots around one end, to detect angles in two or three dimensions.
    • Gamepad - a general handheld game controller that relies on the digits (especially thumbs) to provide input.
    • Game controller - a specific type of controller specialized for certain gaming purposes.
  • Image, Video input devices
    • Image scanner - a device that provides input by analyzing images, printed text, handwriting, or an object.
    • Webcam - a low resolution video camera used to provide visual input that can be easily transferred over the internet.
  • Audio input devices
    • Microphone - an acoustic sensor that provides input by converting sound into electrical signals.
    • Mic - converting an audio signal into electrical signal
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