I might suggest you try higher qpi/vtt voltage you can up it to 1.5v and throttle it down to 1.48v when you achieve slight overclock. Also bump ioh voltage to 1.2v.
This is an HDD thread. Post anything related!
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Say what HDD you have and post a screeny of your best score.
http://www.hdtune.com/
This is just out of my curiosity and maybe to see which hard drives are better in different areas...