Difference between 3gb/s and 6gb/s

Is there really that big of a difference (those speeds are SATA speeds I saw on specs of some ASUS mobos).

There is this asus mobo for like 140 dollars and another one for like 120, the difference is the 3gb/s and 6gb/s.

Will it make that big of a difference? Is it worth saving 20 bucks to go with 3gb/s mobo?

Thanks
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  2. Hi.

    You can see herethe bandwidth comparative of many devices.

    As u can see, SATA II can handle 2,400 Mbit/s and SATA III can handle 4,800 Mbit/s.

    Finally, u can see here some performance chart with the SATA III against SATA II.
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