(redirected from DDR3 SDRAM)
Also found in: Wikipedia.





(Synchronous DRAM) The type of dynamic RAM memory chip that has been widely used since the mid-1990s. SDRAM eliminated wait states by dividing the chip into two cell blocks and interleaving data between them. While a bit in one block is accessed, a bit in the other is prepared for access. See dynamic RAM.

DDR (Double Data Rate)
In 2000, DDR SDRAM doubled the data transfer rate by using both the rising and falling edges of the clock cycle. The data rate of each DDR generation is faster than the previous with a six-fold increase from DDR1 to DDR4. In addition, less power is required (see table below). In order to prevent inserting the wrong DDR into the motherboard, DDR memory modules are keyed differently (for details, see memory module).

Chipsets on the motherboard may support one, two or four memory channels (triple channel has since come and gone). For example, mainstream motherboards support dual channel, which is why memory modules are generally installed in pairs. While data are being read or written to one memory module, the second module is being prepared for reading or writing. High-end motherboards support quad channel. Following are the most popular module speeds for each SDRAM generation. See SGRAM and LPDDR SDRAM.

      Memory Speed   DIMM   Voltage          (MHz)      Module  Required

  DDR4     2400     284-pin   1.2
  DDR4     2133     284-pin   1.2

  DDR3     1866     240-pin   1.35/1.5
  DDR3     1600     240-pin   1.35/1.5
  DDR3     1333     240-pin   1.35/1.5

  DDR2      800     240-pin   1.8/2.5

  DDR       400     184-pin   2.5

  SDRAM     133     168-pin   3.3
  SDRAM     100     168-pin   3.3

Matched Slots for Dual Channel
This motherboard uses colored sockets so that module pairs are inserted properly. It supports three pairs (one orange and two lavender). (Image courtesy of Giga-byte Technology Company Ltd.,

A Little Nostalgia
These 12 bits of magnetic core memory from the Whirlwind computer of the early 1950s take up about a quarter of a square inch. Today, that much space holds billions of bits. (Image courtesy of The MITRE Corporation Archives.)
References in periodicals archive ?
Onboard memory of up to 4 GB DDR3 SDRAM and a soldered eMMC.
1 Jelly Bean as well as Linux based Ubuntu OS RAM 1GB DDR3 SDRAM Storage capacity 4GB or more, ***microSD card to enhance memory space up to 32GB Camera 0.
The government seems to be more serious about the performance this time, as it wants 1GB of DDR3 SDRAM memory and meeting the minimum scores across various other benchmark tests like Antutu, AndEBench, PassMark Performance, RealPi, and CFBench.
It is equipped to make multitasking easy, with up to 8GB* of fast, efficient DDR3 SDRAM at 1600 MHz.
Flash and 512 DDR3 SDRAM, and has VGA and HMDI display ports, four USB 2.
6GHz processor with 2GB DDR3 SDRAM and 16GB SSD storage, which provides up to 6 hours operation between recharging.
6 GHz processor, 4 Gigabytes of DDR3 SDRAM and a 128 Gigabyte SSD hard drive.
Microsemi Corporation (Nasdaq: MSCC), Aliso Viejo, Calif, a leading provider of semiconductor solutions differentiated by power, security, reliability and performance, has announced a DDR3 SDRAM memory device that is the first of its kind to be packaged in a single plastic ball grid array (PBGA) and offered as a compact x64/x72 unregistered dual in-line memory module (UDIMM )/small outline dual in-line memory module (SODIMM).
has developed the industry's first 4Gb DDR3 SDRAM on 25nm process.
Memoria6GB DDR3 SDRAM expandible hasta 8GB y disco duro HDD 1 TB.
As well as supporting up to 8GBytes of soldered DDR3 SDRAM with ECC, it provides support for two PCI-X PMCs or two x8 PCI Express(r) XMCs.