cudaGetDeviceProperties() - clockRate: Core Clock or Shader Clock?

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi,

The [font=“Courier New”]cudaGetDeviceProperties()[/font] function returns a bunch of properties, one of which is [font=“Courier New”]clockRate[/font]. For my broken GeForce GTX 580, the value is 1.54GHz. I was looking for a suitable replacement card, but was confused about ‘core clock’ and ‘shader clock’. The former seems to be in the 700-800MHz range for most cards, and the latter seems to be around 1.5GHz. So, just to confirm if my inference is correct (or that my PC has some high-end card that does have a core clock of 1.54GHz), does the [font=“Courier New”]clockRate[/font] property show the shader clock rate and not the core clock rate?

Thank you!

2

It is the shader clock. You can safely ignore the core clock whenever estimating CUDA device performance.