one of the main and one of the most important components you'll find on the motherboard is the chipset older motherboards were designed with a lot of different chips scattered all over the motherboard there were chips for different things like chips for bus controllers memory controllers keyboard controllers and so on so they had a lot of different chips controlling different functions on the motherboard so as technology progressed computer engineers decided to reduce a number of chips and have them more in a centralized location so instead of having these different chips scattered all over the motherboard controlling different functions they reduce the number of chips to do the same job and condense them to only a few chips or what's now called a chipset and that's what a chipset is a chipset is a smaller set of chips that has replaced a larger amount of chips and the chipsets job is to control data flow between the CPU the peripherals bus slots and memory so all of the different parts of the computer communicate with the CPU through the chipset the chipset basically consists of two chips one is called the Northbridge and the other is called the South Bridge the North Bridge is located in the upper or northern part of the motherboard providing you're looking at the motherboard in the upright position it's located near the CPU and is directly connected to the CPU it's also directly connected to the memory and the AGP and PCI Express slots so in order for the CPU to communicate with the memory and the AGP or PCI Express bus it has to go through the North Bridge first so the North Bridge acts like a communication middleman between a CPU AGP or PCI Express and memory the other chip is called the South Bridge and a South Bridge is located at the bottom or southern portion of the motherboard near the PCI bus slots the South Bridge connects to the PCI bus slots SATA and IDE connectors and USB ports so the South Bridge is responsible for the lower portion of the motherboard while the North Bridge is responsible for the upper portion there is no direct connection between the CPU and the lower portion of the motherboard so if the PCI USB IDE or SATA ports needed to communicate with the CPU the information has to go through the South Bridge and then up through the North Bridge and then to the CPU the Northbridge is faster than the Southbridge and that's because the cpu the PCIe AGP and memory are the most used and most important components of the motherboard so they need to operate at the highest speeds possible the slower Southbridge communicates with the PCI bus SATA and IDE connectors and USB ports and they don't need to be as fast as the other components so basically the higher speed components are connected to the Northbridge and the slower components are connected to the Southbridge now both the north and south bridge make these connections to various parts of the motherboard using pathways called a bus and a bus is simply a set of pathways that allows data and signals to travel between components on the motherboard the motherboard contains several kinds of buses that vary in speed and bandwidth so for example if a bus speed is said to operate at 66 megahertz then that means that that particular bus can send data as 66 million cycles per second the higher the bus speed the faster the computer can send data which improves the performance of the computer a motherboards bus speed generally refers to the speed of the frontside bus the frontside bus is a connection between the CPU and the Northbridge chipset
what is the BIOS CMOS and UEFI so that's what we're going to talk about in this video now BIOS stands for basic input/output system the BIOS is firmware that's built into the motherboard that initializes the computer's hardware as the computer is being booted and then after it initializes the hardware it then searches for a boot device such as an optical drive or a storage drive to boot software such as an operating system so from the start when you first turn on the computer the computer does what's called a power-on self-test or post which is run by the bios it tests the computer to make sure all the requirements are met and if the hardware is working correctly before starting the operating system if the computer passes the test the internal speaker will make a short single beep which indicates that the computer has passed the test and is booting up normally however if there are no beeps or multiple beeps then that means that the computer has failed the test and s...
Comments
Post a Comment