It's built into the chip, the 945GM. If it supports SM2, then you'll be able to use it with the driver loaded. If it's not, then you won't.
I'd like to point out that even if you have the GMA950 which supports SM2, if you are trying to play a game you might not be able to. If you read the back of many game boxes, they clearly state that the game doesn't support mobile chipsets. If updating the drivers doesn't fix your problem, that's because the game doesn't support the GMA950.