Hello, just added a OCZ Vertex 3 120GB to my MacPro 4,1 (Slot Nr 4). For the first 3 hours everything went good. But now I have more and more temporary freezes (for approx 30s). When performing xbench there are the following results: Results 24.28 System Info Xbench Version 1.3 System Version 10.6.7 (10J869) Physical RAM 12288 MB Model MacPro4,1 Drive Type OCZ-VERTEX3 Disk Test 24.28 Sequential 12.26 Uncached Write 341.20 209.49 MB/sec [4K blocks] Uncached Write 396.11 224.12 MB/sec [256K blocks] Uncached Read 3.14 0.92 MB/sec [4K blocks] Uncached Read 447.86 225.09 MB/sec [256K blocks] Random 1225.72 Uncached Write 1392.18 147.38 MB/sec [4K blocks] Uncached Write 706.98 226.33 MB/sec [256K blocks] Uncached Read 3425.98 24.28 MB/sec [4K blocks] Uncached Read 1192.24 221.23 MB/sec [256K blocks] Currently the score varies from 10 points to 40 points (in the first 3 hours I had 380 - 410 points!). It is not possible to boot from the Vertex3 anymore. It seems that there is any problem between my MacPro and the Vertex 3. Maybe a conroller incompatiblity? Can anyone post his own experiences with any SATA3 (6GBps) SSD?