What is CPU?

References from

CPU - Central Processing Unit

Pronounced as separate letters, CPU is the abbreviation for centralprocessing unit. Sometimes referred to simply as the central processor, but more commonly called processor, the CPU is the brains of the computerwhere most calculations take place. In terms of computing power, the CPU is the most important element of a computer system.

On large machines, the CPU requires one or more printed circuit boards. Onpersonal computers and small workstations, the CPU is housed in a singlechip called a microprocessor. Since the 1970's the microprocessor class of CPUs has almost completely overtaken all other CPU implementations.

The CPU itself is an internal component of the computer. Modern CPUs are small and square and contain multiple metallic connectors or pins on the underside. The CPU is inserted directly into a CPU socket, pin side down, on the motherboard.

Each motherboard will support only a specific type (or range) of CPU, so you must check the motherboard manufacturer's specifications before attempting to replace or upgrade a CPU in your computer. Modern CPUs also have an attached heat sink and small fan that go directly on top of the CPU to help dissipate heat.

Two typical components of a CPU are the following:

• The arithmetic logic unit (ALU), which performs arithmetic and logical operations.
• The control unit (CU), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary.

What is motherboard?

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Motherboard

Alternatively referred to as the mb, mainboard, mobo, mobd, backplane board, base board, planar board, system board, or logic board on Apple computers. The motherboard is a printed circuit board that is the foundation of a computer and allows the CPU, RAM, and all other computer hardware components to function and communicate with each other.

Below is a graphic illustration of the ASUS P5AD2-E motherboard and some basic explanations of each of the major portions of the motherboard. Clicking on the below image will give you a larger more detailed version of the below picture.

Motherboard components

Below is a listing of links that describe each of the above mentioned motherboard components in additional detail. Links are listed in clockwise order going from the top-left corner of the image. Components not listed above or found on other motherboards are listed in the next section.

• Expansion slots (PCI Express, PCI, and AGP)
• 3-pin case fan connectors
• Back pane connectors
• Heatsink
• 4-Pin (P4) power connector
• Inductor
• Capacitor
• CPU Socket
• Northbridge
• Screw hole
• Memory slot
• Super I/O
• Floppy connection
• ATA (IDE) disk drive primary connection
• 24-pin ATX power Supply connector
• Serial ATA connections
• Coin cell battery (CMOS backup battery)
• RAID
• System panel connectors
• FWH
• Southbridge
• Serial port connector
• USB headers
• Jumpers
• Integrated circuit
• 1394 headers
• SPDIF
• CD-IN

Other motherboard components

Below is a listing of other motherboard components that are not shown in the above picture or have been part of older computer motherboards.

• BIOS
• Bus
• Cache memory
• Chipset
• Diode
• Dip switches
• Electrolytic
• Fuse
• Game port and MIDI header
• Internal speaker
• Keyboard controller
• LCC
• Network header
• Obsolete expansion slots (AMR, CNR, EISA, ISA, VESA)
• Obsolete memory slots (SIMM)
• Onboard LED
• Parallel port header
• PS/2 header
• Resistor
• RTC
• Serial port header
• Screw hole aka mounting hole
• SCSI
• Solenoid
• Voltage regulator
• Voltage regulator module (VRM)

Motherboard form factors

As computers advanced, so have motherboards. Below is a listing of the various motherboard form factors and additional information about each of these form factors including ATX the most commonly used motherboard form factor today.

• AT
• ATX
• Baby AT
• BTX
• DTX
• LPX
• Full AT
• Full ATX
• microATX
• NLX

What is system unit?

system unit

)The main part of a personal computer. The system unit includes the chassis,microprocessor, main memory, bus, and ports, but does not include thekeyboard or monitor, or any peripheral devices.

A system unit is sometimes called a box or main unit.

Source from

What is RAM?

RAM - random access memory

RAM (pronounced ramm) is an acronym for random access memory, a type ofcomputer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes. RAM is the most common type of memory found in computers and other devices, such asprinters.

Types of RAM

There are two different types of RAM:

• DRAM (Dynamic Random Access Memory)
• SRAM (Static Random Access Memory).

The two types of RAM differ in the technology they use to hold data, with DRAM being the more common type. In terms of speed, SRAM is faster. DRAM needs to be refreshed thousands of times per second while SRAM does not need to be refreshed, which is what makes it faster than DRAM.

DRAM supports access times of about 60 nanoseconds, SRAM can give access times as low as 10 nanoseconds. Despite SRAM being faster, it's not as commonly used as DRAM because it's so much more expensive. Both types of RAM are volatile, meaning that they lose their contents when the power is turned off.

RAM, Main Memory and ROM Explained

In common usage, the term RAM is synonymous with main memory, the memory available to programs. For example, a computer with 8MB RAM has approximately 8 million bytes of memory that programs can use. In contrast,ROM (read-only memory) refers to special memory used to store programs that boot the computer and perform diagnostics. Most personal computershave a small amount of ROM (a few thousand bytes). In fact, both types of memory (ROM and RAM) allow random access. To be precise, therefore, RAM should be referred to as read/write RAM and ROM as read-only RAM.

Takes from

What is ROM?

ROM

Pronounced rahm, acronym for read-only memory, computer memory on which data has been prerecorded. Once data has been written onto a ROMchip, it cannot be removed and can only be read.

Unlike main memory (RAM), ROM retains its contents even when thecomputer is turned off. ROM is referred to as being nonvolatile, whereas RAM is volatile.

Most personal computers contain a small amount of ROM that stores criticalprograms such as the program that boots the computer. In addition, ROMs are used extensively in calculators and peripheral devices such as laser printers, whose fontsare often stored in ROMs.

A variation of a ROM is a PROM (programmable read-only memory). PROMs are manufactured as blank chips on which data can be written with a specialdevice called a PROM programmer .refers from

Bio data Of Me!!!!!! XD

 CSC 134. . .

Assalamualaikum guys and madam n_n . This is the first time I contributed to blogs. Hahaha =3.. So, you will knew a basic information about me!!! Name's Afif Afnan Bin Md. Yusof. 2o years old!!!! I lived in Kajang,Selangor Darul Ehsan.I'm in between of my young brother and sister..

In love with all kind of sports! ! ! Football the most..I'm big supporters of Harimau Malaya,    
Selangor Red Giants, Kelantan The Red Warriors(my village, bulih kecek klate jugok =D and Liverpool The Kop...

Crazy with Dota and Dota 2 (DEFENSE OF THE ANCIENT)!!! "Day-walker, Night-stalker"~

That's all for this post..(I think). See you when I see you. Ciao (>,<) Y
ASSALAMUALAIKUM !!!