When the system remains unresponsive, try giving it the three-finger salute (Ctrl-Alt-Del). This may wake it up. One of my systems does that a lot. Mouse clicks, keypresses, etc. won't wake it up, but Ctrl-Alt-Del does, every time.
Edit: If that doesn't work, clone your OCZ drive onto another. Boot with the clone. Does it have the same problem? If NOT, then update the OCZ's firmware. If that fixes it for the OCZ drive, great. If not (but it's fixed for the clone), then introduce the OCZ drive to your septic tank so it can join the family reunion (RMA it if you can).