RAM (Random Access Memory) is a type of computer storage which is accessible interchangeable contents inside of which still do not care where the data is in memory. This contrasts with the serial memory devices, such as magnetic tape, disc & drum, where the mechanical movement of storage media to force the computer to access data sequentially.
The Others Name of RAM
1. Speed
Speed or velocity, is increasingly becoming an important factor in the selection of a memory module. CPU speed increases, coupled with the development of the use of dual-core processors, making the RAM should have a faster ability to serve the CPU. There are several important parameters which will affect the speed of a memory.
2. Megahertz
The use of this term, beginning in the era of the triumph of SDRAM. Memory speeds, ranging expressed in megahertz (MHz). And still used, even to the DDR2. Calculation based on the time interval (period) is needed between each clock cycle. Usually in the order of nanosecond time. As an example in the memory with the actual clock speed of 133 MHz, would require 8ns access time for 1 clock cycle.
Then shifted by the presence of DDR SDRAM (Double Data Rate). With a major development in the ability to send data twice as many. DDR transmit data twice in one clock cycle. Most products begin using effective clock speed, the result of multiplying two times the data being transmitted. These are more accurately referred to as DDR Rating.
The same thing happened to DDR2. Is the result of the development of the DDR. With the main advantages of low voltage power supply that reduces heat during operation. Also DDR2 memory chip capacity has increased dramatically, enabling a DDR2 chip has a capacity of up to 2 GB. DDR2 also increased the speed compared to DDR.
3. PC Rating
In DDR modules, often found in terms such as PC3200. For the DDR2 module, PC2-3200. Where did this figure come from? Commonly known as PC Rating for DDR and DDR2 modules. As this example is a DDR module with a clock speed of 200 MHz. Or for DDR rating called DDR400. With 64-bit bus width, then the data can be transferred is 25 600 megabits per second (= 400 MHz x 64-bit). With 1 byte = 8 bits, then rounded to 3.200MBps (Mebabyte per second). Throughput figure is used as the value of the PC rating. Additional number "2", both on the PC Rating Rating maupu DDR, only to tell the difference between DDR and DDR2.
4. CAS Latency
Acronym derived from the abbreviation CAS column address strobe or column address select. Meaning they are the same, namely the specific location of an array of data in DRAM modules. CAS Latency, or too often dising-kat by CL, is the amount of time required (in units of clock cycles) during the delay time between data requests sent to the memory controller for the read, until the memory module successfully pull the data output. The lower the CL specification owned a RAM module, with the same clock speed, will result in faster memory access.
The Components Part of RAM
1. PCB (Printed Circuit Board)
2. Contact Point
3. DRAM (Dynamic Random Access Memory)
4. Chip Packaging
5. DIP (Dual In-Line Package)
6. TSOP (Thin Small Outline Package)
7. CSP (Chip Scale Package)