I just installed a 256 GB Ultra+ SSD on my Samsung NC110 Netbook with Intel NM10 chipset, all tweaking enabled (TRIM, AHCI, etc.) and SATA 3 mode working as expected.
The SSD is quite slow: with the AS SSD benchmark tool I get 243MB/s in read and 214MB/s in write, while I was expecting something like 400MB/s.
Anyone had similar low values with the same NM10 Intel chipset?
You are definitely in SATA 3Gb speed. Crystal disk only reports what SATA generation the SSD is not your negotiated SATA link speed. What MB do you have? Are you sure your MB supports SATA 6Gb?