Programs from the hard drive are sent to the RAM for quick access and from there are sent to either the CPU or GPU, depending on whether the operation is calculational or some type of video processing.
To the memory , the CPU can read and write to directly, with individual instructions. The CPU calls instructions and data from the computer's memory.Because there are some programs and instructions which the computer needs and these programs often are permanently recorded in the memory(ram).
The Northbridge interacts between the CPU and RAM.
Front side buss
The Front-side bus
Your data busses sends information from component to component i.e. your FSB (front side bus)/system bus/internal bus communicates between your CPU and RAM, the faster it runs, the faster information is moved between your RAM and CPU giving your CPU quicker access to that data.
In Intel systems- the Front Side Bus In AMD systems- Hyper Transport
The central processing unit (CPU) of a computer is interfaced to the random access memory (RAM) via the front side bus (FSB). Additionally the Northbridge is/can also be interfaced with the CPU through FSBs.
CPU front side bus RAM clock rate
The northbridge chip. The northbridge connects to the CPU through the front-side bus (FSB) and connects to the RAM through the memory bus.
Both the CPU and the memory (RAM) are connected to a massive circuit board called the motherboard. Internationally it is sometimes called a mainboard.The motherboard is made up of layers and groups of copper wires that are used to transmit information. One group of these wires will be dedicated to a task. For example, there is a group dedicated to moving information from RAM to the CPU. We call each group a bus.Buses are the reason why the metaphor of a "data highway" is sometimes used. There are many types and sizes of buses used for different needs. Memory access has one kind, disk access has another kind.Depending on the type of CPU and type of RAM you will have a unique bus design that allows the CPU to communicate with the RAM.This is why RAM for new computers has more pins (bigger bus) and a higher bus speed than RAM for old computers.
The speed of system random-access memory is determined by two factors: bus width and bus speed. Bus width refers to how many bits of information RAM can send to the CPU at the same time.
RAM (random access memory)
to conserve the battery life by reducing the bus speed between the CPU and RAM
Address Bus - Transmits memory addresses between the CPU and RAM.Data Bus - The bus that transfers data between CPU and RAM. Expansion Bus - The bus to which add-on adapter cards are connected in order to enhance the functionality on the PC. Video - The bus that transmits display information between the CPU and video circuitry.
The CPU talks to the RAM via the Front Side Bus (FSB.) The FSB is controlled by the Northbridge processor built into the computer's main board (Motherboard.) The Northbridge also manages your PCI_Express 16x slots, and integrated video cards.
The purpose of RAM is to allow your CPU faster access to programs. If your CPU had to go to the Hard Drive anytime it wanted a program your computer would run very, very slowly. So for example, if you click on Internet Explorer, it is placed in RAM. Your CPU can access data out of RAM very quickly, like 1 million times a second. That's why if you have lots of RAM, then more of the Internet Explorer program can go into RAM, while if you have to little RAM, then your computer is slower because the CPU has to wait while more of the program is loaded into RAM from your hard drive.