Output >> Buffer Size

NI-DAQmx C Properties

Output >> Buffer Size

Data Type: uInt32
Description: Specifies the number of samples the output buffer can hold for each channel in the task. Zero indicates to allocate no buffer. Use a buffer size of 0 to perform a hardware-timed operation without using a buffer. Setting this property overrides the automatic output buffer allocation that NI-DAQmx performs.

You can get/set/reset this property using:
  DAQmxGetBufOutputBufSize
  DAQmxSetBufOutputBufSize
  DAQmxResetBufOutputBufSize