You could check what firmware it uses, as 3.011 is the most recent.
When you ran AS SSD benchmark did it list the partition alignment in green (this is in the top left and is visible as soon as open program without having to perform benchmark).
AS SSD will also report what SATA controller driver is install, e.g. msahci, iastore.
And have you got drive connected to Intel SATA port zero instead of other brands (not checked motherboard specs).