Difference in Clock rate and memory clock rate Clock Rate

Hello,

What is the difference between the cudaDeviceProp fields clockRate and memClockRate.
Is the first one SP clock rate and the later memory controller clock rate?
Also somewhere I read that, there are three different clocks in GPU. How does that compare with this?

Thank you,

There’s a paragraph about this in the Anandtech review of the 680, on the first page: http://www.anandtech.com/show/5699/nvidia-geforce-gtx-680-review

There’s still 3 clocks, but an old one is gone and a new boost clock is there. I don’t know what SP clock rate refers to, so can’t answer that.

Thanks! But I still dont get it…I got that the 680 has the shader clock removed. But I have a GTX480 and it shows 2 clocks around 1GHz.
I meant:
cudaDeviceProp.clockRate : core clock
cudaDeviceProp.memClockRate : memory controller clock