This sample shows how to enable Framelock in an application using the WGL_NV_swap_group extension.

Framelock is available on systems that have their AMD FirePro GPUs connected to an ATI FirePro S400 board.

Framelock can be used to synchronize the SwapBuffers of several application instances running on different GPUs. These can be either multiple GPUs in one system or multiple systems each with one or more GPUs.  Having Framelock enabled will ensure that all participating GPUs will execute the SwapBuffer of the application at exactly the same time.