DDR3 SDRAM (Double Data Rate three Synchronous Dynamic Random Access Memory) is a high-speed RAM used to store data when the computer is running. Besides being a part of the computer, DDR3 SDRAM is also used in other digital electronic devices.
DDR3 SDRAM is including SDRAM family, is one of the results of the application of DRAM technology in 2008 is still relatively new. DDR3 SDRAM is the successor generation and the development of its predecessor, the DDR2 SDRAM. DDR3 SDRAM main advantages is its ability to perform I / O buses to four times the speed of the memory cells. This is the result of DDR3 SDRAM is able to transmit more data and faster than its predecessor. But the DDR3 SDRAM has higher latency than DDR2 SDRAM. DDR3 technology is a great opportunity creation capacity of 512 Mbit memory chips up to 8 Gbit, and effectively it is possible the accomplishment of the memory module manufacturing capacity of a maximum of 16 GB.
Actually, prototypes DDR3 SDRAM has been announced in early 2005. The product itself recently appeared on the market in mid-2007 based on Intel P35 chipset Bearlake. According to the news, AMD also plans to adopt DDR3 in 2008.
DDR3 SDRAM has 240 pins, the same number to the pin DDR2 SDRAM. The length of DDR3 SDRAM is also equal to the length of DDR2 SDRAM, but both types of modules are electronically incompatible with each other, and both have the notch location different.
Energy consumption DDR3 SDRAMDDR3 SDRAM energy consumption is lower than its predecessor, DDR SDRAM and DDR2 SDRAM. In fact, it was reported that the reduction or decrease of DDR3 SDRAM energy consumption reaches 16% to 17% compared to DDR2 SDRAM. Voltage required by these three types of DRAM in order to work or operate normally, is different. DDR SDRAM requires a voltage of 2.5 volts, 1.8 volts require DDR2 SDRAM, DDR3 SDRAM while requiring 1.5 volts. Supply voltage of 1.5 Volts is ideal for memory chips manufactured using the 90 nm manufacturing technology. Memory chips DDR3 SDRAM many manufactured using 90 nm manufacturing technology. Some of the chip maker plans to use transistors 'dual gate' to reduce leakage currents that may occur.
JEDEC (standards development organization for the semiconductor business) recommends the use of DDR3 SDRAM maximum voltage of 1,575 volts, and memory modules must be able to withstand the voltage to 1.975 volts although the voltage of the possibility of a memory chip is not able to work perfectly (the chip does not work perfectly) as in normal conditions.
DDR3 SDRAM BandwidthInternal controller for DDR working on two bits of data from the data storage media (storage), DDR2 can do 4 bits at a time, while DDR3 is able to do 8 bits at a time, so the DDR3 SDRAM has a data transfer speed twice faster than DDR2 SDRAM or four times faster than DDR SDRAM. Thus, one of the advantages of DDR3 SDRAM lies in bandwidth.
At the same memory bus frequency (fundamental frequency or frequencies real), DDR3 SDRAM has higher bandwidth than its predecessor.
Bandwidth is the maximum amount of data that can be transferred (transmitted) in an electronic network (such as a bus or channel) within a certain time unit. The amount of data is usually measured in bits or bytes, while the unit of time used is usually the second (second).
Here is presented a table comparing the bandwidth or the maximum data transfer rate per second of DDR SDRAM, DDR2 SDRAM, DDR3 SDRAM and the same memory bus frequency.
- DRAM (Dynamic Random Access Memory)
- FPM DRAM (Fast Page Mode DRAM)
- EDO RAM (Extended Data Out RAM)
- SDRAM (Synchronous Dynamic Random Access Memory)
- RD RAM (Rambus Dynamic Random Access Memory)
- DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access Memory)
- DDR2 SDRAM (Double Data Rate two Synchronous Dynamic Random Access Memory)
- DDR4 SDRAM (Double Data Rate four Synchronous Dynamic Random Access Memory)
- SRAM (Static RAM)
- VRAM (Video Random Access Memory)
- SGRAM (Synchronous Graphics RAM)