Sunday 2 October 2011

Difference Between SDRAM and DDR RAM Memory

Before you know what is the Difference Between SDRAM and DDR SDRAM. You Must know First What Exactly the Meaning of Each type.

What is SDRAM?
Synchronous dynamic random access memory (SDRAM) is dynamic random access memory (DRAM) that is synchronized with the system bus. Classic DRAM has an asynchronous interface, which means that it responds as quickly as possible to changes in control inputs. SDRAM has a synchronous interface, meaning that it waits for a clock signal before responding to control inputs and is therefore synchronized with the computer's system bus. The clock is used to drive an internal finite state machine that pipelines incoming instructions. This allows the chip to have a more complex pattern of operation than an asynchronous DRAM, enabling higher speeds.

What is DDR SDRAM?
Double data rate synchronous dynamic random access memory (DDR SDRAM) is a class of memory integrated circuits used in computers. DDR SDRAM (sometimes referred to as DDR1 SDRAM) has been superseded by DDR2 SDRAM and DDR3 SDRAM, neither of which are either forward or backward compatible with DDR SDRAM, meaning that DDR2 or DDR3 memory modules will not work in DDR equipped motherboards, and vice versa.

What is their Differences?

Dynamic Random Access Memory is used to temporarily store information on computers. DRAM is made up of many cells and each cell is referred to as a bit. A cell contains a capacitor and a transistor. Since computer machine language is made up of 1s and 0s, it has the value of one when active and zero when inactive.

SDRAM or Synchronous Random Access Memory is the result of DRAM evolution. This type of memory synchronizes the input and output signals with the system board. Its speed ratings are in MHz. SDRAM was introduced in 1996 and is still used today. SDRAM transmits every clock count at a specific time.

DDR RAM (or Double Data Rate Random Access Memory) does the same but it does so twice every clock count. This makes DDR RAM twice as fast as SDRAM. Over the years, RAM has become very fast and efficient -- and it will be exciting to see what's coming next.

The 184-pin DDR RAM-type memory has replaced the 168-pin SDRAM and is suited for computer processors that are 1GHz or higher.

The 168-pin SDRAM memory chip is not included in newly produced PCs (since 2007) and was used with processors lower than a gigahertz.'

Theoretically 512 MHz Memory is 100% faster Than 256 MHz Memory is. In real life, the performance gain is much lower. If the change is worth it totally depends on the software you use. For your purpose, the only thing that will really run faster are Games. Not all games by the way, only those ones that use the higher Memory bandwidth.