MSI R7950 Twin Frozr 3GD5 V2 or V2/OC?

I just bought a MSI R7950 Twin Frozr 3GD5  V2/OC. That should have a standard core speed of 880Hz Now when I look in "AMD Vision control center -> Information -> hardware"
Then I see that my core speed is 800Mhz it should be 880Mhz. Do I have a V2 or a...