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How do I tell if a SATA port is SATA 1, 2, or 3?

How do I tell if a SATA port is SATA 1, 2, or 3 on my motherboard. If this helps it's the motherboard from a Dell XPS 435MT. And also will SATA 1 or 2 bottleneck 7200RPM drives? I know 3 won't because that can't even bottle neck SSDs at the moment.
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  1. Almost positive it's SATA 2.
  2. Best answer
    That motherboard is likely to have SATA II with the intel chipset. It may have a third party controller that offers SATA III.

    SATA I 1.5Gbps
    SATA II 3.0Gbps
    SATA III 6.0Gbps

    Mechanical drives don't really need anything faster then SATA II, even then that is accommodate quick transfers from the cache. Most 7200RPM drives top out between 120 and 140 MB/s

    SATA III is actually saturated by the faster SSDs at around 550 MB/s. A new standard will be available called SATA Express in the near future. SATA III will be the consumer standard for the next several years.
  3. tachybana said:
    Page 36 here says that is has SATA 3 connections as well


    That's not the speed of the port, that's the port number. As Getochkn stated all 4 SATA ports are more than likely SATA 2 (3Gb/s).
  4. Dereck47 said:
    tachybana said:
    Page 36 here says that is has SATA 3 connections as well


    That's not the speed of the port, that's the port number. As Getochkn stated all 4 SATA ports are more than likely SATA 2 (3Gb/s).



    No tachybana is right, I just read it, it says there is one SATA 3 port.
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