I got 1 of these drives and having same issues as the OP. Not sure if I have it set up right or not as never owned an SSD before. Benched once with that AS app.
http://img837.imageshack.us/f/captureyw.jpg
Same as OP really got mine for the OS and a game or two on it in time. As of now fresh OS install.
I have mine in Sata 3 (the 6Gb's sata port which is port 7 on the Gigabyte X58A-UD3R)
Firmware 1.22
88GB free
As for that ATTO, any recommended settings..?
You need to configure your bios to run in AHCI mode and install the latest Intel RST driver.