What is the function of the motherboard on the computer?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

A motherboard is also known as a main board, system board and logic board. A common abbreviation is 'mobo'. They can be found in a variety of electrical devices, ranging from a TV to a computer. Generally, they will be referred to as a motherboard or a main board when associated with a complex device such as a computer, which is what we shall look at. Put simply, it is the central circuit board of your computer. All other components and peripherals plug into it, and the job of the motherboard is to relay information between them all. Despite the fact that a better motherboard will not add to the speed of your PC, it is none-the-less important to have one that is both stable and reliable, as its role is vital.

A motherboard houses the BIOS (Basic Input/Output System), which is the simple software run by a computer when initially turned on. Other components attach directly to it, such as the memory, CPU (Central Processing Unit), graphics card, sound card, hard-drive, disk drives, along with various external ports and peripherals.
20 people found this useful

Where is the motherboard in a computer?

A motherboard is the central printed circuit board in many modern computers and holds many of the crucial components of the system, providing connectors for other peripherals.

Why is there a battery in your computer motherboard?

so that when your PC is turned off at the wall it can keep things like memmory and important components working.

List functions of motherboard?

Motherboard in a personal computer is the main PCB (printed circuit board) on which the process and major peripheral chips reside either directly assembled or mounted through sockets. It also has connector for external interfaces and sockets for adding memory, harddisk and optical drives. Boot memory and BIOS also resides on the motherboard. - Neeraj Sharma

Functions of a Motherboard?

motherboard is the heart of the computer, also provide an area where the internal components can connect.

What does a motherboard do in a computer?

The mother-board holds all the important components and circuitryto enable the computer to function. It also serves as a connectionpoint for peripherals such as the keyboard, screen, disc drives,scanners, printers etc.

Can you change your computer motherboard?

Unless your computer case is specially manufactured for the motherboard that is installed, you can change the motherboard.. You can start by getting the manufacturer and model of the current motherboard (often found to one side of the video card slot), and taking that information with you when you purchase the replacement. Any competent PC parts vendor can determine what motherboard will work as a replacement.

Function of a motherboard?

A motherboard functions as the brains of a computer. All componentsare wired into the motherboard and ran through there.

How do you reset the computer motherboard setting?

There should be a button at the back on ur motherboard, depending on what motherboard u have. Otherwise, press during boot and reset BIOS

Is the motherboard can increase the computer performance?

The two main things to look for when you're looking to buy a computer when it comes to speed is processor speed and motherboard speed. So don't JUST pay attention to the motherboard but a nice speed motherboard can greatly increase the speed of a computer.

Why is the motherboard called the heart of the computer?

The reason the motherboard is refereed to as the heart is because much like the heart in our body, it allows everything to function, a sort of gateway in which everything must run through to have life

Functions of the motherboard parts?

1 - Firewire header Firewire is also known as IEEE 1394. It is basically a high performance serial bus for digital and audio equipment to exchange data. The technology preceded USB but yet is faster than any current USB port. Often used for transferring digital video to the PC straight from a digital camera. The FireWire header onboard means you can install a FireWire port on your machine. Again these cables are often supplied as an optional extra which you will need to check with the retailer to see if they are supplied with your board. 2 - PCI Express 16x slots Now the most common slot for Graphics cards, the PCI Express 16x slots provides 16 separate lanes or data transfer. PCI express 1.0 slots offer a data transfer rate of 250MB/s the second generation of PCI express (PCI Express 2.0) offers twice the data rate at 500MB/s. Currently in development is PCI Express 3.0 which offers 1GB/s of data transfer. PCI Express 16x slots are also the basis for both SLI and Crossfire multi graphics card setups. With the increasing demands graphics cards are putting on systems, no less than a 16 lane slot will be good enough for any modern graphics card. 3 - PCI Express 1x Slot Like the PCI Express 16x above the 1x slot uses exactly the same system but only has a single lane of serial data transfer. These slots are used for expansion cards that do no require the same amount of data transfer that a graphics card requires. You will usually find components such as tv tuners, network cards and sound cards make use of the PCI Express 1x slot. You will also notice the difference in size between the 1x and the 16x slots. The PCI Express 1x slot is noticeably smaller and easy to spot. 4 - Chipset - North Bridge (with heatsink) The Motherboards chipset can be described as what sets it apart from other boards in its category. Different chipsets contain different features and components. A chipset is a number of integrated circuits built onto the board to provide specific functions e.g. one part of the chipset may be an onboard component such as a modem or sound chip. Other parts may be used to control the CPU functions. Most chipsets are designed to work with only one "class" of CPU although now many older chipsets support more than one type of CPU such as socket 7 which supports the Pentium, Cyrix 686, Cyrix MII, AMD K6 and K6-2. There are certain restrictions though to what type of processor a chipset can handle because of the logic that the CPU uses to access the memory and its cache etc. Since these chips are working harder with each generation, motherboard manufacturers have started to put heatsinks and active coolers (fans) on the main parts of the chipset to disperse some of the heat. 5 and 8 - ATX Power connector The standard ATX power connector, the cable for this will be coming from the PSU, a clip is normally provided to make sure you get them in the correct order. As a tip, don't try to push too hard if its stuck, check to see that it is in the correct way, I have seen plenty of power connectors where the pins have pushed out some of the connectors, these can be difficult to get back into place, so its best to be careful. 6 - CPU (Central Processing Unit) socket All the CPU "sockets look very similar, however they are different in the way they have different amount of pins and in different layouts. There are currently two major CPU socket types PGA and LGA. PGA or Pin Grad Array uses a system of pins on the CPU and holes on the socket to line up and hold a CPU in place. The introduction of the ZIF (Zero Insertion Force) socket for PGA types allowed the CPU's to be lined up without any pressure on the CPU until a level is pulled down. LGA or Land Grid Array uses a system of gold plated copper pads that make contact with the motherboard. It is very important to read your motherboard manual to discover what types of CPU's you motherboard supports as most motherboards are aimed at a specific type of CPU. 7 - DIMM (Double Inline Memory Module) slots DIMM's are by far and away the most used memory types in today's computers. They vary in speeds and standards however and they need to match up to what your motherboard has been designed to take. The four standards of DIMM's being used at the moment are SDR (Single Data Rate), DDR (Double Data Rate), DDR2 and DDR3. The speeds of memory can vary between 66Mhz to 1600Mhz. Get great Value on Memory Upgrades at SavaStore Click Here 9 - Motherboard controls Not available on all motherboards, but some allow direct control of the motherboard via simple buttons. Power switch, error checking, CMOS clearing, passwords and more features can be accessed directly on the motherboard on some models. 10 - Chipset - South Bridge When we talk about chipsets you mainly only ever hear about the North bridge. Even those into PC technology have a hard time naming the south bridges without looking them up. Names like Nforce 2 and KT600 are North bridges. The South Bridge does an important job as well. It handles things like the PCI bus, onboard Network and sound chips as well as the IDE and S-ATA buses. 11 - Serial ATA Connector Serial ATA or more commonly seen as S-ATA is a new way of connecting your Hard Drives to your PC. S-ATA drives have the capability of being faster than the IDE counterparts and also have smaller thinner cables which help with the airflow of the system. S-ATA hard disks are fast becoming the norm for hard drive technology. Current motherboards feature both IDE and S-ATA connectors to facilitate all types of storage hardware. 12 - USB 2.0 header As well as having USB ports on the rear of the motherboard, motherboard manufacturers often add a couple of USB headers so you can connect optional cables for extra USB ports. These cables are often supplied and you only need to add them on if you need the extra connectivity. USB 2.0 replaced USB 1.1 as a much faster solution. It is backwards compatible meaning all USB 1.1 devices will work in these new USB 2.0 ports. 13 - Motherboard Battery The battery gives the board a small amount of power in order to store some vital data on your machine when the power is off. Data stored is that like the time and date so you don't have to reset them every time you boot the machine up. Motherboard batteries are usually long lasting Lithium batteries. Removing this can reset all the data on your machine including the BIOS settings, however not replacing this correctly can lead to irreparable damage to the motherboard. Only remove the battery if it is dead or if you can't have access any other way to resetting the data on your machine by use of the clear CMOS jumper or something similar. 14 - PCI (Peripheral Component Interconnect) slot The PCI bus (not PCI express) is now an older technology and although the PCI slots are still available, they have decreased in number and are being replaced by the PCI Express 1x slots. Its unlikely that you will get a motherboard without a PCI slot at the moment due to the fact that a lot of components still use the standard PCI slot. It would be awkward to upgrade to a system without PCI slots as it may mean upgrading more components than you would like to, 15 - Floppy Drive Connector More simple than the IDE connector you only have to remember to get the red line to pin 1 of the connector and the red line to pin 1 on the floppy drive, This port is only to be used with floppy drives. You may not have a floppy controller on your motherboard as its slowly being phased out as more people are using writable CD's and DVDs to transfer data, to store data and to use as boot up discs. 16 - IDE connector Not on Diagram The connector to which you will insert an IDE cable (supplied with motherboard) IDE cables connect devices such as hard disks, CD Drives and DVD Drives. The current 4 standards of IDE devices are ATA 33/66/100 and 133. the numbers specify the amount of data in Mb/s in a max burst situation. In reality there is not much chance of getting a sustain data rate of this magnitude. Both the connectors and devices are backwards compatible with each other, however they will only run at the slowest rated speed between them. All IDE cables will come with a red line down one side, this red line is to show which way it should be plugged in. The red line should always connect to pin one of the IDE port. Checking your motherboard documentation should show you which end is pin one. In some cases it will be written on the board itself. In the case of ATA 66/100/133 there is a certain order that you plug devices in, the cable is colour coded to help you get them in the correct order. . The Blue connector should be connected to the system board . The Black connector should be connected to the master device . The Grey Connector should be connected to the slave device 17 - BIOS (Basic Input Output System) Chip - Not on Diagram The BIOS holds the most important data for your machine, if configured incorrectly it could cause your computer not to boot correctly or not at all. The BIOS also informs the PC what the motherboard supports in terms off CPU etc. This is why when a new CPU is introduced that physically fits into a slot or socket you may need a BIOS update to support it. The main reason for this is that different CPU's use different logics and methods and so the BIOS has to understand certain instructions from the CPU to recognise it.

What is the function of motherboard south bridge?

Is a chip that implements the "slower" capabilities of the motherboard in a northbridge/southbridge chipset computer architecture.

Where is motherboard in a computer?

It is mounted on either the side or bottom of the case. ^It is mounted to a backplane, a metal "plate" that the motherboard screws/clips onto. In most standard cases, the backplane is located on the right side of the case when looking at the front of the case. There are almost no exceptions to this rule, except some small form factor designs where the motherboard sits on the bottom of the case. By far the most common is to mount on the right side though.

What is a motherboard on a computer?

Motherboard is the main structure to which all other devices like CD rom, USB, Soundcard, etc... are connected. All connections are from mother board because the processor and builtin primary harddrive are fixed in mother board.

What is the function of motherboard to computer system?

The motherboard is where most of the processing takes place. The central Processor chip is nearly always on the motherboard. So too is the memory and supporting circuitry. ROM chips and connectors for the controlling switches are found here. The motherboard usually has slots, or connectors for daughter boards, for additional i/o devices and other add ons (so the daughter boards work for the mother!). Devices which are made to be easily upgraded (swappable) can be put onto its own sub-board in an expansion slot. For example, video boards can be substantially speedier and more functional than another one, and it is convenient to be able to switch one without requiring swapping the entire motherboard (if the video was built into it). PCI is one type of connection to a daughter board. Other interfaces, like networking or sound or another processor, can be found on a daughter board. In summary, the motherboard contains some critical components of the system, with connections to other devices to complete the system.

What is motherboard and its functions?

A motherboard is the central printed circuit board (PCB) in some complex electronic systems, such as modern personal computer. The motherboard is sometimes alternatively know as the main board or system board . The function of it is , were processing take place.

What is the function of the jumper on the motherboard?

Jumpers can do a lot of things, some motherboards have many of them. Basically they are a manual switches, that can be closed by shorting them with a jumper cap. Some examples are, jumpers that set the CPU speed, or reset the BIOS memory.

How is a motherboard and essential part of a computer?

The motherboard is the primary circuit board within a personal computer. Many other components connect directly or indirectly to the motherboard. For example, the CPU (the "brains" of a computer) is connected to the motherboard. It is the main part of a computer The mother board is the central framework of the computer. It is the means by which all communications from one device in the computer are transferred to another device in the computer. It contains a pathway from each device to the CPU (or central processing unit) and back out to the devices again, one of those devices being the monitor for you to interact with.

What is the function of a chipset in a motherboard?

The actual function of a chipset is to communicate between all components of the modern PC, or, to put it in other words, the chipset is the infrastructure. The chipset contains numerous components, and moreover, it makes various interfaces available for connecting additional components (PCI, USB, AGP, IDE, etc). As a rule, the chipset consists of two units, the Northbridge and the Southbridge. The reason that it is made of two units instead of one is that it's difficult to integrate all components onto a single chip. The use of two chips also allows for different combinations of Southbridge and Northbridge chips. Today, most manufacturers have a small building-block type of system from which the motherboard makers can choose components to suit customer requirements. The Northbridge usually contains the CPU interface and the memory controller. With nForce and nForce2, the graphics unit is also on the Northbridge. This chip is clearly larger in size compared to the Southbridge, because hundreds of data paths are needed for the processor and the RAM. Because of this, all complex chips are packed in BGA (Ball Grid Arrays) casing, where all the soldered connections are located on the underside of the chip. The Southbridge contains at least a PCI controller, floppy/ IDE/ hard disk controllers, serial and parallel ports, USB support and power management functions. Through the years, the chipsets have gained extended functionality through the Southbridge, which is the reason that nowadays these units often also include interfaces and codecs for sound or network controllers. This means that motherboard manufacturers only need to provide simple controllers, which are much cheaper to produce than complete PCI network cards or sound cards.

What is the motherboard on the computer?

A motherboard is the central Printed Circiut Board (PCB) in some complex electronic systems, such as modern personal computers. The motherboard is sometimes alternatively known as the mainboard , system board , or, on Apple computers, the logic board ... http://www.answers.com/motherboard#cite_note-Engadget-0it is the main board of a computer, usually containing the circuitry for the central processing unit, keyboard, and monitor and often having slots for accepting additional circuitry.

What does the computer term 'motherboard' mean?

The term motherboard refers to the main circuit board inside a computer. It holds the CPU, memory, provides expansion slot and connects to every part of the computer, directly or indirectly.

What is a function of a motherboard?

The function of a motherboard is fairly simple. To put it easily, it is the main control of your computer. It is the main board your computer is running on at all times. If you don't have a motherboard, your computer will not do anything when you press power. It's like a brain. You, or anything, for that matter, cannot function without a brain operating it.

Short note on motherboard of computer?

motherboard is a most important part of system.Motherboard also now as main board or main CKT board or plaenboard all the component of system intrigrated are attached vaya motherboard.

What is the purpose of a motherboard in a computer?

The motherboard is the main printed circuit board and contains the buses, or electrical pathways, found in a computer. These buses allow data to travel between the various components that comprise a computer. A motherboard is also known as the system board, the backplane, or the main board. The motherboard accommodates the central processing unit (CPU), RAM, expansion slots, heat sink/fan assembly, BIOS chip, chip set, and the embedded wires that interconnect the motherboard components. Sockets, internal and external connectors, and various ports are also placed on the motherboard. The form factor of motherboards pertains to the size and shape of the board. It also describes the physical layout of the different components and devices on the motherboard. Various form factors exist for motherboards. An important set of components on the motherboard is the chip set. The chip set is composed of various integrated circuits attached to the motherboard that control how system hardware interacts with the CPU and motherboard. The CPU is installed into a slot or socket on the motherboard. The socket on the motherboard determines the type of CPU that can be installed. The chip set of a motherboard allows the CPU to communicate and interact with the other components of the computer, and to exchange data with system memory, or RAM, hard disk drives, video cards, and other output devices. The chip set establishes how much memory can be added to a motherboard. The chip set also determines the type of connectors on the motherboard. Most chip sets are divided into two distinct components, Northbridge and Southbridge. What each component does varies from manufacturer to manufacturer, but in general the Northbridge controls access to the RAM, video card, and the speeds at which the CPU can communicate with them. The video card is sometimes integrated into the Northbridge. The Southbridge, in most cases, allows the CPU to communicate with the hard drives, sound card, USB ports, and other I/O ports.

How do you remove the motherboard on a computer?

Step 1: Open the case and discharge any static by touching something metal. Step 2: Disconnect all the wires in the case to get the m out of the way. Be sure you know how to get them all back in the right way. Step 3: Remove all the expansion cards such as video cards, sound cards, and network cards. Step 4: If your power supply is top mounted, it probably blocks the motherboard. If it does, remove it. Most bottom mounted PSUs don't cover the motherboard. Step 5: Turn your case on its side so the motherboard is on the bottom. Step 6: Take the heatsink off the CPU. Remove the CPU. Step 7: Take out the RAM cards. Step 8: There should be a number of screws holding the motherboard in. Unscrew them. Step 9: GENTLY lift the motherboard out BY THE EDGES, not the back or front. Note that everything in your computer connects to the motherboard, so if you replace it be sure that everything is compatible.

What is the function of a motherboard heat sink?

a heat sink is a passive heat exchanger component that cools a device by dissipating heat into the surrounding air. In computers, heat sinks are used to cool central processing units or graphics processors.

What are the parts of motherboard and their functions?

The most important part of the motherboard is the CPU socket, which is where the CPU is installed. Then you also have the Northbridge and the Southbridge which is what carries the motherboards two chipsets. In addition to that you have several parts where other components are connected: RAM memory slots, Expansion slots (for graphics cards, sound cards, or other add-ons), Storage controllers and connectors (nowadays these are usually SATA, but in the past used to be PATA), LAN controller, Audio controller and Audio connections, USB connections and controllers, and many more.

How do you remove the motherboard battery from your computer?

There is a little clip that holds it in. Look at the circle, at some point around it,you will see a small clip, you push it away from the battery and it will allow the battery to come out. Now, when you touch a motherboard, you are suppose to wear a anti static strap, and remove all power from the motherboard. If you do not know what I am referring to then please do not do it as you could damage the motherboard. Read your manual before you attempt this. It will explain it.

What have to be compatible for a CPU and Motherboard to function?

step 1 learn how to write full sentences that make sense step 2 google the cpu and it should tell you what kinda motherboard to use

What are the functions of key motherboard components?

USB ports enable you to attach USB-compliant devices The NIC enables you to attach the computer to a LAN or a WLAN The parallel port enables you to connect devices such as printers and external drives

Is motherboard consider the brains of a computer?

No, the CPU is the brains of the computer and interprets instructions received, equivaqlent to your brain responding to stimuli and selecting a course of action to follow. An equivalent analogy for the motherboard would be your neurological system. The motherboard, like neurotransmitters, receives and transmits messages to and from input/output sources (keyboard, mouse, etc.) to the CPU.

Does every computer have a motherboard?

yes; the motherboard is the board and chips that connect your CPU (the main chip, that does all the computations) to everything else, such as the display, the mouse, the keyboard, and the hard drive.

When you turn on the computer what happens to the motherboard?

The ATX power supply standard requires that there be two supplies in the Power Supply Unit. One is the high power unit to power the PC itself and the other is a low power, low voltage one to bootstrap the PSU into life. The bootstrap power supply is always on. This bootstrap voltage is connected to the power switch via a wire on the ATX PSU conenctor on the motherboard. When you close the switch, it brings the main supply to life and the CPU boots up. Part of the bootup process is to set a bit in a register that electronically "pushes" the button for you, thus keeping the PC powered up. This, by the way, is how a PC can shut down under program control. The CPU just "lets go" of that virtual button, which consists of another one of the wires in the ATX PSU connector. Once powered up and all voltages are stable (typically less than 1 second), the CPU runs the boot up program in the motherboards Flash/ROM memory. This in turn instructs the CPU how to read the Hard Disc Drive to get another boot up program specific to your system. This is usually also the boot up program for your OS, if you are not "dual booting". That program in turn loads your OS into memory and your PC is up and running.

Can computer run without a motherboard?

No. The mother board is required because all data and electricity from all and too all components flow through the mother board.

What are the main components of a motherboard and their functions?

CPU Socket - This holds the CPU or central processing unit of the computer. A CPU does most of the heavy lifting and thinking inside of a computer. . RAM slots - These hold the RAM, or Random Access Memory. RAM is the workbench in your computer, holding all of your open programs for you. . North Bridge - This chip is usually located right beneath the CPU socket and its usual functions are to communicate effectively between the CPU, RAM, Graphics Chips, and South Bridge on your computer. . South Bridge - This chip handles all the communication between all the other input/output devices on your computer (USB ports, mouse, keyboard, speakers, etc.) and the North Bridge . PCIe, PCI, AGP and ISA card slots - These slots are used to expand the capabilities of your motherboard, from TV tuners for watching TV to a better sound card for your 7.1 channel surround sound system. . Front Panel pin out - This is usually a group of 9 pins that connects the power and reset buttons, and the power and hard drive lights on the front of your computer to the motherboard. . USB and audio pin-outs - These connect to a cable that runs to the front of your computer so that you can have front facing USB and audio ports. . Back IO Connector - This is usually where you plug in most of your stuff on your computer and usually has your keyboard and mouse ports, USB ports, Video connector, audio jacks, network jack, among others. . SATA, IDE, and Floppy connectors - These connect up to the main storage devices on your computer, including your hard drive, DVD/CD drive, and of course, the floppy drive on the front of your computer. . BIOS - This holds the information your motherboard needs to start itself, and also keeps track of the current time.

Which computer motherboard is the easiest to configure?

Nowadays they're pretty much all the same, with essentially zero "configuration" required. Ten years ago, you might have had to set a jumper or two, so it wasn't like they were "difficult" to configure even then.

What is purpose and function of a motherboard?

chapter 1 the soldiers the indians were sold in sinais tribe the kings the majesty and chalice

What parts of the computer fits on the motherboard?

hard disk smps (switch mode power supply) ,ram , graphic card,dvd writer,hard disc,external usb are the parts connected to the mother board

What can you plug into slots on the motherboard and provide additional functionality for your computer?

If you have them you could plug in additional fans allowing the tower to stay cooler.

What is the functions of cmos to the motherboard?

CMOS (complementary metal oxide semi conductor) is a logic family. A logic family refers to the way of implementing logic. Using this technique, logic gates are realized. The combination of several logic gates forms a digital circuit or integrated circuit (IC). A mother board is also an IC. The technique used to realize it is CMOS logic.

Which are the chip sets on a computer motherboard?

The chipset of a motherboard consists of both Northbridge and Southbridge. Northbridge is the faster component, as it handles things such RAM and CPU. Southbridge on the other hand, takes things slow and handles components of the motherboard such as USB, Ports (audio, speaker, mic). The Northbridge and Southbridge must be made by the same manufacturer. For example, you cannot put a Northbridge AMD on a motherboard with Southbridge Intel.

What is the function of heart sink on a computer motherboard?

I think you mean to ask "what's the function of a heat-sink on a pc motherboard" in which case the function is to keep the cpu cool and prevent it from overheating.

Where to find the motherboard on a computer?

By opening the computer(usually two screws on the back loosen one side of the computer) you see most of the parts inside. . Power supply unit or PSU. . Processor or CPU (central processing unit). . Memory or RAM (random access memory). . Hard drive. . Optical drive DVD-RW CD-RW Bluray . Cables - ribbons. These are all connected to the Motherboard. It will be the biggest flat part resting on the unopened side of the computer.

What does a computer motherboard consist of?

if your building a Computer from Scratch you will need: POWER SUPPLY... which kinda helps a little bit right? RAM sticks.. for memory and loading pages... PROCESSOR ... some mother boards have 2 slots for processor to fit in if u want a super fast computer... HARDDRIVE ... to store Data and have your Operating System on it like Windows 7 Will not work with out any Operating System on it will need Fans for your Processor At least it will go .... COOKED if u dont and might need to buy another processor if u cook it hope this helps ya good luck :)

What does a southbridge do in a computer motherboard?

The purpose of the Southbridge chip is to help with communication between the CPU and other devices such as PCI, ISA and the IDE. Locating the Southbridge can be challenging when trying to replace chip.

What does a motherboard do for a computer?

A motherboard is the central component of a computer that mostother components hook up to. The CPU is housed on a motherboard,and other components such as hard drives, memory modules and add-oncards are also installed onto a motherboard.

What does computer motherboard do?

The motherboard connects all hardware so the power supply cansupply the hardware with power and the data sent form the hardwarereaches the CPU.

What is motherboard computer?

A "motherboard" is a term for system board or mainboard, a circuitboard that ties all of the components of a computer together tomake it run.

What is the Function of bios in motherboard?

BIOS, or Basic Input/Output System, is used to set certain settingsfor hardware in a computer. This is includes (but isn't limitedto): -Boot loader (What to load an operating system (OS) from, or an OSinstallation disk) -Overclocking settings (for a processor) -Date and time that is held on the motherboard Fairly recently though, BIOS has been replaced by motherboardmanufacturers by a UEFI, or Universal Extensible FirmwareInterface. Which is able to perform hardware diagnostics andrepairs, without an OS.

How is a motherboard an essential in a computer computer?

The motherboard - is essentially the 'brains' of the computer. Itcontains hardware and software to enable the different parts of thecomputer to talk to each other - as well as allowing the computerto display results to the operator. It also allows the computer to'talk' to other computers - and send data to be printed or storedelectronically.