Try the SATA drive first with the AHCI turned off.
Then try the SATA drive with AHCI turned on
Any differences?
Then try the SSD on the one that worked best.
Be sure that your SSD firmware is the latest available from the SSD manufacturer's website (not the DVD that came with it). Also ensure that the controller drivers on your mobo is the latest available.
To fix the symbols, open the debugger and select: File...Symbol File Path
Paste the following into the box there and click on OK.
Then, when closing the debugger, answer Yes the first time it asks to save the Workspace (and answer "No" every time after that)
Code:
SRV*c:\symbols*http://msdl.microsoft.com/download/symbols