Difference in Clock rate and memory clock rate Clock Rate

Accelerated Computing CUDA CUDA Programming and Performance
1

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,

2

There’s a paragraph about this in the Anandtech review of the 680, on the first page: NVIDIA GeForce GTX 680 Review: Retaking The Performance Crown

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.

3

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