Having put an SSD in my MacBook (7,1 Model) In System Information under Serial-ATA as follows;

Link Speed: 3 Gigabit

Negotiated Link Speed: 1.5 Gigabit.

Why is this? The Negotiated Link Speed should be 3 Gigabit. The SSD is SATA-III and capable of 6GB/s, I appreciated that the SATA controller (NVidia MCP89) doesn't support SATA-III and 6GB/s but 3GB/s would be nice. I have reset the SMC. Any Ideas?