What is computer memory ?
In computing memory refers to devices used to store instructions given by the user or data in a sequence and get access to it any time, the data might be stored temporarily or permanent depending the type of memory. Basically there are two concepts of computer memory stated Primary and Secondary.
In computing memory refers to devices used to store instructions given by the user or data in a sequence and get access to it any time, the data might be stored temporarily or permanent depending the type of memory. Basically there are two concepts of computer memory stated Primary and Secondary.
Primary storage
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Secondary storage
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Computer Memories
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RAM (Random Access Memory)
There are many generations of ram but these three are the well known.(SDRAM,DDR,DDR2,DDR3).
SDRAM: (Synchronous Dynamic Random-Access Memory) is old version od RAM used by most computers from 1996-2002. The speed was calculated in MHz. It works with the system clock and manage i/o.
DDR: stands for Double Data Rate is successor of SDRAM. It is twice faster then SDRAM because it can send and receive signals twice per clock cycle.
DDR2: is much similar to previous DDR in design but it is more faster. It actually uses less power then DDR and has bigger bandwidth. Only difference is that DDR2 does not fix in DDR slots.
DDR3: is similiar to DDR2 but consume almose 30% less power and can transfer data twice as fast.
While DDR2 memory can transfer data at up to 3200 MBps (megabytes per second), DDR3 memory supports maximum data transfer rates of 6400 MBps.
There are many generations of ram but these three are the well known.(SDRAM,DDR,DDR2,DDR3).
SDRAM: (Synchronous Dynamic Random-Access Memory) is old version od RAM used by most computers from 1996-2002. The speed was calculated in MHz. It works with the system clock and manage i/o.
DDR: stands for Double Data Rate is successor of SDRAM. It is twice faster then SDRAM because it can send and receive signals twice per clock cycle.
DDR2: is much similar to previous DDR in design but it is more faster. It actually uses less power then DDR and has bigger bandwidth. Only difference is that DDR2 does not fix in DDR slots.
DDR3: is similiar to DDR2 but consume almose 30% less power and can transfer data twice as fast.
While DDR2 memory can transfer data at up to 3200 MBps (megabytes per second), DDR3 memory supports maximum data transfer rates of 6400 MBps.
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ROM (Read Only Memory)
ROM is memory containing hardwired instructions that the computer uses when it boots up, before the system software loads. In PCs, the instructions are read from a small program in the ROM, called the BIOS (Basic Input/Output System).
ROM is memory containing hardwired instructions that the computer uses when it boots up, before the system software loads. In PCs, the instructions are read from a small program in the ROM, called the BIOS (Basic Input/Output System).
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CACHE
Stores recently used information so that it can be quickly accessed at a later time. like recently opened web browser, any file used from hdd, any application running ETC.
Stores recently used information so that it can be quickly accessed at a later time. like recently opened web browser, any file used from hdd, any application running ETC.
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HARD DISK (HDD)
The hard drive is what stores all your data. It houses the hard disk, where all your files and folders are physically located. A typical hard drive is only slightly larger than your hand, yet can hold over 100 GB of data. The data is stored on a stack of disks that are mounted inside a solid encasement. These disks spin extremely fast (typically at either 5400 or 7200 RPM) so that data can be accessed immediately from anywhere on the drive. The data is stored on the hard drive magnetically, so it stays on the drive even after the power supply is turned off.
The hard drive is what stores all your data. It houses the hard disk, where all your files and folders are physically located. A typical hard drive is only slightly larger than your hand, yet can hold over 100 GB of data. The data is stored on a stack of disks that are mounted inside a solid encasement. These disks spin extremely fast (typically at either 5400 or 7200 RPM) so that data can be accessed immediately from anywhere on the drive. The data is stored on the hard drive magnetically, so it stays on the drive even after the power supply is turned off.
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CD-ROM
Stands for "Compact Disc Read-Only Memory." A CD-ROM is a CD that can be read by a computer with an optical drive. The "ROM" part of the term means the data on the disc is "read-only," or cannot be altered or erased. Because of this feature and their large capacity, CD-ROMs are a great media format for retail software. The first CD-ROMs could hold about 600 MB of data, but now they can hold up to 700 MB. CD-ROMs share the same technology as audio CDs, but they are formatted differently, allowing them to store many types of data.
Stands for "Compact Disc Read-Only Memory." A CD-ROM is a CD that can be read by a computer with an optical drive. The "ROM" part of the term means the data on the disc is "read-only," or cannot be altered or erased. Because of this feature and their large capacity, CD-ROMs are a great media format for retail software. The first CD-ROMs could hold about 600 MB of data, but now they can hold up to 700 MB. CD-ROMs share the same technology as audio CDs, but they are formatted differently, allowing them to store many types of data.
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USB (Flash drive)
Stands for "Universal Serial Bus." USB is the most common type of computer port used in today's computers. It works same as storage device and stores data on it.
Stands for "Universal Serial Bus." USB is the most common type of computer port used in today's computers. It works same as storage device and stores data on it.