(OVERCLOCK AT OWN RISK, USE CAUTION)
I've found that I've been able to push the Core speed from 650 up to 800mhz & the Memory speed from 800 to 950mhz.
This has given me an extra 1300 points in 3D Mark 2006, I currently get a score of around 9300.
You will need to enable full access in the settings as well as edit the .cfg file in directory where you install the software.
EnableUnofficialOverclocking = 1
UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode = 1
AccessibilityCheckingPeriod = 0
In the software it allows you to force 100% fan speed & increase your core & memory speeds.
Remember I have only safely tested it up to 800 / 950mhz. I don't advise going any higher. Monitor your temperatures, mine stock is 75 degrees & goes up to 85 degrees "overclocked". Anything higher is unchartered territory.
Don't overclock if you not willing to risk it!