SATA 3 HDD to SATA 2 Port.Performance

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themirror

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Feb 4, 2012
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If I plug my seagate ST31000524AS(which is SATA 3) to a sata 2 port(have only two sata 3 ports on my MB) I heard that there will be no performance degrade as the hdd is slow and sata 2 is way faster that what the hdd can perform. Is that true?

Edit:I'll be using it to store data like movies, music etc.
 
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Dereck47
HDDs can be SATA 3 (6Gb/s) "compatible", not SATA 3 (6Gb/s) "capable".
No HDD can spin fast enough to achieve 6Gb/s speeds. The ST31000524AS has a 32MB cache buffer that can transfer its contents at 6Gb/s speeds, but that's it.

The Read/Write speeds for the drive are up to 125MB/s. http://www.seagate.com/docs/pdf/datasheet/disc/barracuda-7200-12-ds1668-6-1101us.pdf

So you can connect the drive to a 3Gb/s port or a 6Gb/s port and you will get the same performance.
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Dereck47

Dereck47

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Jan 20, 2011
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HDDs can be SATA 3 (6Gb/s) "compatible", not SATA 3 (6Gb/s) "capable".
No HDD can spin fast enough to achieve 6Gb/s speeds. The ST31000524AS has a 32MB cache buffer that can transfer its contents at 6Gb/s speeds, but that's it.

The Read/Write speeds for the drive are up to 125MB/s. http://www.seagate.com/docs/pdf/datasheet/disc/barracuda-7200-12-ds1668-6-1101us.pdf

So you can connect the drive to a 3Gb/s port or a 6Gb/s port and you will get the same performance.
 
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