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Member Since: Apr 08, 2012
Posts: 3
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I have the same problem with my MacBook Pro 15" Core 2 Duo (Model A1211).
Since I replaced the original hdd with a "Kingston SSDnow V200 Series 256GB, SATA-3" SSD the mac suddenly hangs or freezes. The rainbow pinwheel shows up and I have to hard reset the computer.

A possible reason for that could be:
The MacBook Pro only has a SATA 1 interface and the SSDnow V200 Series are only backward compatible to SATA 2, please see:
Technical Support for SV200S3 | Kingston Technology
Interface SATA Rev. 3.0 (6Gb/s) – with backwards compatibility to SATA Rev. 2.0

I assumed (my fault) that all SATA 3 drives are backward compatible to SATA 1. I fear I was wrong...
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