gpu-async feature

Please can someone explain me what is the --gpu-async feature (oclHashcat+) ? When/For what should I use it ? (nvidia GTX260)

Thank you.
It's useful for low-end GPUs.
Do you consider that mine (nvidia GTX260) is a low-end GPU ?
Nope, it's for something with 32-64 shaders.
Off-topic (sorry)
Mem5: I tried replying to your pm but it seems as you disabled recieving pm's.