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Sata 2 v Sata 3 cable

Discussion in 'Storage Drives' started by nmungur, 16 Apr 2010.

  1. nmungur


    Joined: 2 Feb 2010

    Posts: 93

    Location: Leeds


    I have taken delivery of my shiny new mobo and WD HD. In the box there is a SATA 2 cable. I am aware that there is a SATA 3 cable. The HD is a 6gb/s one. Does anyone know if there is a difference in data transfer using a 2 or a 3 cable?

    I would have thought in theory a SATA 3 cable would give a large difference over a SATA 2, however I have been told that there is very little difference in transfer speeds between the 2...

    Does anyone have any data to support or disporove? Or even any comments about how sunny it is today :)
  2. TheVoice


    Joined: 15 Aug 2005

    Posts: 21,752

    Location: Glasgow

    Given how (comparatively) slow HDDs are, it won't make any practical difference at all.
  3. Philtor


    Joined: 20 Nov 2009

    Posts: 5,963

    SATA II cables are the exact same as SATA III cables. Don't forget it's the speed of the interface we are talking about here.
  4. SMN

    Wise Guy

    Joined: 2 Nov 2008

    Posts: 2,474

    Location: The ether

    Yup, the cable is just the medium. Its about the interface which controls the medium where your speed comes from. FWIW SAS uses the same cable also and those drives run twice as fast as SATA generally (15K vs 7.2K) - its all about the upper layers :)