Early 2009 Mac Pro with SSD Sandisk Extreme

Hi everyone,

Just had a quick question for anyone who may know...

I recently did the SDD upgrade for my mac pro (4,1) and bought a Sandisk Extreme SSD 120 GB, and the OWC sled for the drive. Installed a fresh install of ML and tested the drive with the Black Magic Speed tester. I am getting around 127MBs write speeds and 259 MBsRead speeds. This seems slow considering the drive has speeds of up to 6GBs and SATAII can go up to 3GBS. Is this a correct speed? Or is my disk faulty? Granted it is faster that a 7200 HDD drive, although not by much according to my testing. Am I missing something here? Any insight is much apperciated.

Ian