3TB "SATA 6g/s" hard drives motherboard connections. Isn't SATA2 exactly the same as SATA3?

Hi,

I've got an SSD that I'll be using my SATA3 Mobo connection with. I also have 3 large 3tb hard drives that are advertised as SATA 6g/s---but I'm told that really is kind of false advertising, given that a SATA 3g/s connection will be just the same.

Is this correct?

Thanks so much for the input.
8 answers Last reply
More about 3tb sata hard drives motherboard connections sata2 sata3
  1. HDD's typically won't perform to the SATA3 maximum, not unless it has high RPM and low seek rates. Even SSD's are hard pressed to max out the potential of SATA3. Typically, motherboards will have 2 SATA3 ports and the rest are SATA2. Obviously, dedicate the SATA3 to the SSD and connect the HDD's to the older SATA2. Good luck!
  2. No, yes, no,... :) The hdd has a SATA 6g/s interface, but that is almost useless, because a mechanical drive is to slow to use it. That's why it makes no difference if you connect it to SATA II or III.
  3. HDDs that are advertised as SATA 6Gb/s can only transfer the contents of their cache buffer (8MB or 16MB or 32MB or 64MB) at SATA 6Gb/s speeds.

    No HDD can spin fast enough to Read or Write at SATA 6Gb/s speeds.
  4. Dereck47 said:
    HDDs that are advertised as SATA 6Gb/s can only transfer the contents of their cache buffer (8MB or 16MB or 32MB or 64MB) at SATA 6Gb/s speeds.

    No HDD can spin fast enough to Read or Write at SATA 6Gb/s speeds.


    Oh! Well then won't I notice a difference? I guess if I wasn't using my SSD for browsing, games etc then I would. But if I store movies etc on the HD, will I notice a performance difference in opening files etc. I imagine not.
  5. No, you won't notice a difference. Your drive's Read/Write performance will be the same if it is connected to a 3Gb/s port or a 6Gb/s port.

    What is the model of your HDD?
  6. Seagate Barracuda 3 TB HDD SATA 6 Gb/s NCQ 64MB Cache 7200 RPM

    It was on a huge sale (much less than WD drives).

    I'll also have a SSD.

    I have another question that I've been trying to answered better a sale ends: which is better, ASUS GTX660-DC2O-2GD5 GeForce GTX 660 2GB vs EVGA GeForce GTX650Ti Boost SuperClocked 2GB GDDR5
  7. SATA 1 (1.5Gb/s) speeds are from 1MB/s to 150MB/s.
    SATA 2 (3Gb/s) speeds are from 151MB/s to 300MB/s.
    SATA 3 (6Gb/s) speeds are from 301MB/s to 600MB/s.

    Your drive's Read/Write speeds are up to 149MB/s. http://www.seagate.com/files/staticfiles/docs/pdf/datasheet/disc/barracuda-xt-ds1696.3-1102us.pdf

    Sorry, I don't know the answer to your graphics card question. Start another thread n the Graphics & Displays section of the Hardware Forum.
  8. [quotemsg

    I have another question that I've been trying to answered better a sale ends: which is better, ASUS GTX660-DC2O-2GD5 GeForce GTX 660 2GB vs EVGA GeForce GTX650Ti Boost SuperClocked 2GB GDDR5

    ASUS GTX660-DC2O-2GD5 GeForce GTX 660 2GB is better without any confusion regarding performance.
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