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When replacing my HDD in my MBP 3,1 with a SSD (SATA3), I noticed that the SATA1 cable can be fully removed.

Thus I thought, that it might be possible to replace the SATA 1 cable by a SATA 3 cable in order to boost my SSD use.

However, I do not know whether this is supported by the Logicboard... Any idea?

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My best suggestion is that you try. Worst case it will downscale to SATA1/2 speed if it's all it can handle.

The easiest way to determine if your board will support the speed of SATA3 is to have a look at your Serial ATA settings in system information and check your link speed. It will show the supported speed and negotiated speed.

I have a MBP 6,2 which does support SATA3 on the board. I know my MB 3,1 only support SATA1, however it was always a low spec model compared to the MBP range and it may have been limited to save cost.

Link Speed

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Thanks. Well, I checked... mine also supports only 1.5 gigabit. –  gentmatt Nov 10 '11 at 9:28
    
@Matt yes, only recent models started to support the new SATA. My Macbook Air mid-2011 does have it. –  Martín Marconcini Nov 10 '11 at 9:50

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