I recently installed a 120 GB OWC Mercury Electra 6G SSD into my secondary drive bay using the install kit from OWC. Using Blackmagic Disk Speed test I am only getting on average 100-150 mb/s writes and 150-180 mb/s read speeds. This is far from the 500+ advertised (and even the real world tests I've seen on YouTube). Does anybody have any idea as to why my speeds are so low? I do have the firmware upgrade that was released in 2011 to un-throttle the 6G SATA speeds. I don't think it is simply the app because I used the same app on my 2012 Macbook Air and got 400+ mb/s sustained read/write speeds. Any advice on this would be appreciated.