GeForce GTX 560M with Memory Clock @625Mhz?

Hi guys I have this laptop with a GeForce GTX 560M and I noticed that the memory clock on GPU-Z says it is running @625MHz but it is supposed to be @1250MHz as the nvidia site states http://www.geforce.com/hardware/notebook-gpus/geforce-gtx-560m/specifications So I got kinda curious and downloaded MSI Afterburner and it says it is running @1250MHz and now I'm just wondering what can be happening over here since every other reading is exactly the same (GPU-Z <-> MSI AfterBurner)

Is there a certain way to check this values?

It's just the timing .... nothing to worry about ... google ram timing and ram frequency if you really want to learn

Thank you very much :) I'm gonna do that (y)

ddr

double data rate

625*2=1250