| Random access memory (commonly known as RAM | | | | DDR3 RAM double-data-rate three synchronous |
| or as simply Memory) is writeable as well as readable | | | | dynamic random access memory is the name of the |
| data storage used in computers and also in other | | | | new DDR memory standard that has been |
| electronic instruments. It is integrated circuits that | | | | developed. The power consumption reduction is 40% |
| allow the stored data to be quickly and randomly | | | | as compared to current commercial DDR2 modules, |
| accessed at and without any physical movement of | | | | due to DDR3's 90 nm fabrication technology using |
| the storage medium or reading head in a constant | | | | "Dual-gate" transistors to reduce leakage of current. |
| trme. It connects to Motherboard via one of Socket | | | | DDR3's prefetch buffer width is 8 bit, whereas |
| Integration. Most types of RAM lose their data when | | | | DDR2's is 4 bit, and DDR's is 2 bit. Theoretically, |
| the computer powers down. Computers use RAM to | | | | these modules could transfer data at the effective |
| hold the program code and data during computation. | | | | clockrate of 800-1600MHz to date, such bandwidth |
| RAM is also known as 'main memory' or primary | | | | requirements have been mainly on the graphics |
| storage. A smaller amount of static random-access | | | | market, where fast transfer of information between |
| memory is also integrated with the CPU, but this is | | | | framebuffers is required. While the DDR3 specification |
| usually referred to as "cache" memory, rather than | | | | will be available in mid-2007. Supposedly, Intel has |
| RAM. | | | | preliminarily announced that they expect to be able |
| The word "random" refers to the fact that any piece | | | | to offer support for it in mid 2007 with a version of |
| of data can be accessed randomly, quickly, and in a | | | | their upcoming Bearlake chipset. AMD's roadmap |
| constant time, regardless of its physical location and | | | | indicates their own adoption of DDR3 to come in |
| whether or not it is related to the previous piece of | | | | 2008. |
| data. It is not serial access or sequential access | | | | Major Manufacturers: Mushkin Samsung Micron |
| memory like CD-ROM or megnatic tape etc. | | | | Technology Corsair Memory Kingston Technology |
| There are various types of memoryTypes: | | | | Rambus Technologies and Others. |
| SDRAM (synchronous dynamic random access | | | | The average computer, as of 2006, could hold up to |
| memory) which is a type of solid state computer | | | | 2 gigabytes of RAM, which is generally considered |
| memory. | | | | more than enough to sustain both intensive |
| DDR SDRAM double-data-rate synchronous dynamic | | | | multi-tasking as well as heavy graphics applications. |
| random access memory is a class of memory. | | | | Capacity measurement: |
| Effectively, it nearly doubles the transfer rate | | | | The most common measurements of RAM capacity |
| without increasing the frequency of the front side | | | | are 210 (1,024) or kilo bits, bytes or words of binary |
| bus. Thus a 100 MHz DDR system has an effective | | | | memory because 1,024 is close to 1,000. Similarly, |
| clock rate of 200 MHz when compared to equivalent | | | | mega and giga are used to represent 220 and 230, |
| SDR SDRAM. | | | | respectively. Thus a megabyte of RAM is almost |
| RDRAM or DRDRAM Direct Rambus DRAM or | | | | always 1,048,576 bytes, not a million. In 1999, new |
| DRDRAM (sometimes just called Rambus DRAM or | | | | prefixes, kibi, mebi and gibi, were introduced to |
| RDRAM) is a type of synchronous dynamic RAM, | | | | unambiguously represent binary quantities, which is |
| designed by the Rambus Corporation. | | | | yet to catch up. |
| DDR2 SDRAM or double-data-rate two synchronous | | | | Several kinds of stable RAM are being development |
| dynamic random access memory is a random access | | | | using the carbon nanotubes and the magnetic tunnel |
| memory technology used for high speed storage of | | | | effect technologies. Data will preserve in these RAM |
| the working data of a computer or other digital | | | | while power shut down. These we see in the form |
| electronic device. Its primary benefit is the ability to | | | | of flash memory (pen drives). Capacities for these |
| run its bus at twice the speed of the memory cells it | | | | will now exceed 150 gigabytes with speeds far |
| contains, thus enabling faster bus speeds and higher | | | | exceeding traditional RAM. This development will |
| peak throughputs than earlier technologies. This is | | | | smudge the definition between traditional random |
| achieved at the cost of higher latency. | | | | access memory and disks, and will dramatically |
|  | | | | reducing the performance diffrence. |