Different RAM | JamiiForums | The Home of Great Thinkers

Dismiss Notice
You are browsing this site as a guest. It takes 2 minutes to CREATE AN ACCOUNT and less than 1 minute to LOGIN

Different RAM

Discussion in 'Tech, Gadgets & Science Forum' started by Buswelu, Jan 21, 2010.

  1. Buswelu

    Buswelu JF-Expert Member

    Jan 21, 2010
    Joined: Aug 16, 2007
    Messages: 1,989
    Likes Received: 42
    Trophy Points: 145
    Hi Team

    Nimekuwa Niki surf kwenye internet kuangalia version mpya za computer na specification zake.

    Kuna Hizi RAM Mpya kwangu na sijui utofauti wake ni upi...DDR,DDR2,DD3...4GB DDR2 memory ?

    Naomba kama kuna mtu mwenye ujuzi wa hizi tofauti za RAM.Hasa ukiangalia kwenye Tovuti.

  2. MziziMkavu

    MziziMkavu JF-Expert Member

    Jan 22, 2010
    Joined: Feb 3, 2009
    Messages: 39,620
    Likes Received: 4,611
    Trophy Points: 280
    Difference Between SD, DDR, DDR2 and DDR3 RAM Explained

    SD, DDR, DDR2 and DDR3 are all different types of RAM (Random Access Memory). RAM is a kind of computer memory that temporarily stores information, improving your systems performance. Or in other words RAM simply holds data for the processor. The processor also has its own memory known as the L2 cache, the cache lies between the processor and the RAM. The processor sends and retrieves data from this cache, when this cache overflows data is sent to the RAM.

    There are mainly four types of RAM; SD, DDR, DDR2 and DDR3. They differ in the way they operate and mainly in their operation speeds. All RAM's used in computers today have a synchronous interface meaning they wait for a clock signal before it can respond to clock signals.

    SD RAM:

    SDRAM stands for synchronous dynamic random access memory. SDRAM is Single Data Rate meaning that SDRAM can accept one command and transfer one word of data per clock cycle. As mentioned above SDRAM's have synchronous interface therefore they depend on the computer clock signals to perform operations. Typical speeds of SDRAM are 100 and 133 MHz.


    DDR SDRAM stands for double data rate synchronous dynamic random access memory. DDR RAM transfers data twice per clock cycle, hence the name double data rate. DDR clock speeds range between 200 MHz (DDR-200) and 400 MHz (DDR-400). DDR-200 transfers 1600 MB/s, while DDR-400 transfers 3200 MB/s.


    DDR2 SDRAM stands for double data rate 2 synchronous dynamic random access memory.DDR2 is twice as fast as DDR which means twice as much data is carried to the module for each clock cycle. Also due to the design improvements DDR2 consumes less power as compared to the DDR memory. DDR2 speeds range between 400 MHz (DDR2-400) and 800 MHz (DDR2-800). DDR2-400 transfers 3200 MB/s. DDR2-800 transfers 6400 MB/s.


    So by now after reading the above it is quite obvious what DDR3 SDRAM stands for, double data rate 3 synchronous dynamic random access memory. In theory DDR3 is supposed to act twice as fast as DDR2 memories. Thus DDR3 speeds range between 800 MHz (DDR3-800) and 1600 MHz (DDR3-1600). DDR3-800 transfers 6400 MB/s; DDR3-1600 transfers 12800 MB/s.

    Only gamers may notice the difference between DDR2 and DDR3 speeds, while for everyone else, even DDR will be sufficient. But if you are buying a new PC spending a little extra for the increased speed is always appreciated.
    But in the end it all depends on your requirements and your budget. DDR3 will cost a lot more than DDR2, also for DDR3 speeds you will also need a motherboard that can support it, so if you are planning on upgrading your RAM to DDR3 you should be certain that your motherboard can support it. If your requirements do not involve heavy gaming or video editing and video processing then you have no need for the powerful DDR3 memory..

    Kwa Ushauri wangu tumia hii 4GB DDR2 memory mimi natumia Mother Board Biostar na Ram ya Model ya King ston 3G kwa Maelezo zaidi bonyeza hapa utaona MotheBoard yangu na maelezo yake zaidi http://www.biostar.com.tw/app/en/mb/content.php?S_ID=314
  3. Buswelu

    Buswelu JF-Expert Member

    Jan 22, 2010
    Joined: Aug 16, 2007
    Messages: 1,989
    Likes Received: 42
    Trophy Points: 145
    Thanks mkubwa...Thats all I was looking for.