What's the difference between SRAM and DRAM?

Question

..yeah.

Answer 1

SDRAM stand for Synchronous Dynamic Random Access Memory and basically consists of collection of cells, IO buffers and power circuitry. All three subsystems are synchronized at the time of working. DDR RAM stands for Double Data Rate Random Access Memory.
The major difference between SD RAM and DDR RAM is speed. DDR RAM can pass the data at approximately double the speed of SD RAM and the simple formula of performance is “more fast data transfer, better will be the performance”. This double speed of DDR RAM is due to its property of transferring data on both the rising and falling edges of the clock signal. Another important thing is motherboard. Your motherboard must have the compactable chipset to support the different types of RAM. SD RAM and DDR RAM are not interchangeable. PC66, PC100 and PC133 are the three types of SDRAM that are available in the market. Each succeeding number specifies the bus speed of the SD RAM in MHz i.e. PC66 can run maximum at 66 MHz; PC133 can run maximum at 133 MHz. SDRAM does not perform so well because of latencies. As the processor and other computational units cannot read the information or the data so fast, this decreases the performance of SDRAM. On the other hand, there are several types of DDR RAM available in the market; the main type includes PC2100, PC2700 and PC3200. The PC2100 of DDR RAM runs at maximum of 266 MHz and PC3200 can runs at maximum of 400 MHz. SD RAM and DDR RAM also differ in number of connector pins. SD RAM has 168 pins connector and DDR RAM has 184 pins connector. DDR RAM hit the computer industry in 2001.

For benchmarks here's a good article:

Answer 2

SRAM (static RAM) is random access memory (RAM) that retains data bits in its memory as long as power is being supplied. Unlike dynamic RAM (DRAM), which stores bits in cells consisting of a capacitor and a transistor, SRAM does not have to be periodically refreshed. Static RAM provides faster access to data and is more expensive than DRAM. SRAM is used for a computer's cache memory and as part of the random access memory digital-to-analog converter on a video card.


Dynamic random access memory (DRAM) is the most common kind of random access memory (RAM) for personal computers and workstations. The network of electrically-charged points in which a computer stores quickly accessible data in the form of 0s and 1s is called memory. Random access means that the PC processor can access any part of the memory directly rather than having to proceed sequentially from some starting place. DRAM is dynamic in that, unlike static RAM (SRAM), it needs to have its storage cells refreshed or given a new electronic charge every few milliseconds. Static RAM does not need refreshing because it operates on the principle of moving current that is switched in one of two directions rather than a storage cell that holds a charge in place. Static RAM is generally used for cache memory, which can be accessed more quickly than DRAM.

DRAM stores each bit in a storage cell consisting of a capacitor and a transistor. Capacitors tend to lose their charge rather quickly; thus, the need for recharging. A variety of other RAM interfaces to the computer exist. These include: EDO RAM and SDRAM.

Answer 3

Just dependent on your Motherboard. There's more ram than just that too. Your motherboard spec sheet will tell you what type of ram you need.

Answer 4

very simple the technologies are different.
sram came before dram
dram is faster but it needs two chips
that is all