Is it plugged into SATA III or SATA II? Because that sounds like it's only a SATA II port.
Yes, it is plugged into the SATA III port, I'm sure of that. But I'm not sure if maybe the Marvel controller is doing something odd as, like I said, it said the device was in IDE mode or something. But I'm not sure how I would change that.
You should not connect your SSD through the Marvel controller, because its performance is very bad. Connect the SSD to the Intel Controller, EVEN IF it is SATA II, as it is better than Marvel SATA III.
Then follow the instructions above given by Z1NONLY.
Also as I have just written on the other post enable Trim. Type CMD in the search box in the Start Menu, then click on CMD (Run as Administrator) Type: “fsutil behavior query DisableDeleteNotify”, Press Enter.
The result should be “0″.
If the result is “1″, TRIM is disabled.
In order to enable TRIM type the following command: “fsutil behavior query|set DisableDeleteNotify = 0″
Disk Defragmenter Schedule should be Turn Off -- and Disable Disk Defragmenter and Drive Indexing.