evolution of memory development

S I M M
Stands for Single In-Line Memory Module, a module or a memory chip that is attached on one side of the PCB circuit. This type of memory has only a number of legs (pins) of 30 and 72 pieces.
30 pin SIMM form of FPM DRAM, widely used in the processor-based systems 386 and 486 final generation earlier generations. SIM pin 30 with a capacity of 1MB, 4MB and 16MB.
While the 70 pin SIMM can be either FPM DRAM and EDO DRAM is used together with the final generation of the processor 486 and Pentium. 70 pin SIMM is produced in the capacity of 4MB, 8MB, 16MB, 32MB, 64MB and 128MB.
EDO RAM
In 1995, were created the kind of memory Extended Data Output Dynamic Random Access Memory (EDO DRAM), which is a refinement of the FPM. EDO memory read cycle can shorten it so that it can improve performance about 20 percent. EDO has an access time is quite variable, which is about 70ns to 50ns and working at a frequency of 33MHz to 75MHz. Although EDO is an improvement of FPM, but both can not be installed simultaneously, because of differences in ability. EDO DRAM memory is widely used in systems based on Intel 486 and Pentium compatibles as well as earlier generations.
D I M M
Short for Dual In-Line Memory Module, a module or a memory chip that is placed on both sides of the PCB, each reversed. DIMM memory is produced in two different forms, namely the number of legs 168 and 184.
DIMM 168-pin can be either Fast Page, EDO and SDRAM ECC, with capacities ranging from 8MB, 16MB, 32MB, 64MB and 128MB. While the DIM pin of DDR 184 SDRAM.



SDRAM
At the turn of the year 1996 - 1997, Kingston to create a memory module which can work at a speed (frequency) the same bus / sync with a working frequency of the processor. That's why Kingston call this kind of memory Synchronous Dynamic Random Access Memory (SDRAM). SDRAM is then better known as the PC66 because it works on a 66MHz bus frequency. Unlike the previous type of memory that requires a fairly high working voltage, SDRAM only requires a voltage of 3.3 volts and has an access time of 10ns.
With his best at the time and have been mass produced, not only by Kingston alone, it is quickly becoming the standard memory of PC66 this memory at the time. Socket 7 processor-based systems like Intel Pentium Classic (P75 - P266MMX) and compatibles from AMD, WinChip, IDT, and so can work very fast by using these PC66 memory. Even the first generation Intel Celeron II still uses PC66 SDRAM memory system.
DDR RAM
In 1999 two large companies microprocessor INTEL and AMD compete in the increase in CPU clock speed. But confronted with obstacles, because when increasing the memory bus to 133 Mhz Memory requirements (RAM) will be greater. And to resolve the issue then be made DDR RAM (double data rate transfers) that was originally used on the graphics card, because now you can use only 32 MB for 64 MB capacity. AMD is the first company to use DDR RAM on the motherboard.
DDR2 RAM
When the memory type DDR (Double Data Rate) perceived by the accelerating pace began to slow down the performance of the processor and graphics processor, DDR2 memory is the presence of logical advances in memory technology refers to the addition of speed and anticipation of the width of the access point triangle processor, memory, and interface graphics (graphic card) which comes with double the computing speed.
The main differences between DDR and DDR2 is the data rate and increased latency doubled. This change is intended to produce a maximum speed in an increasingly faster computing environment, both in terms of processor and graphics.
In addition, DDR2 voltage requirement also decreased. If the registered DDR voltage 2.5 Volt needs, the needs of DDR2 is only 1.8 volts. That is, advances in technology DDR2 requires less power to write and read in the memory.
DDR2 own technology first used on several graphics device interface, and eventually introduced new technology use in RAM. And DDR2 technology is not compatible with DDR memory so that its use could only be done on a computer that does support DDR2.
DDR3 RAM
DDR3 RAM has a power requirement is reduced approximately 16% compared to DDR2. This is because DDR3 is already using 90 nm technology so that only the power required konsusmsi 1.5v, much less when compared to DDR2 and DDR 2.5V 1.8v. In theory, held by the RAM speed is quite stunning. He was able to transfer data with an effective clock of 800-1600 MHz. In the 400-800 MHz clock, much higher than DDR2 at 400-1066 MHz (200-533 MHz) and DDR for 200-600 MHz (100-300 MHz). The prototype of DDR3 has 240 pins. It's actually been introduced long ago in early 2005. However, the product itself actually appeared in mid-2007 along with a motherboard that uses Intel P35 Bearlake chipset and the motherboard supports DIMM slots