AMD has just unveiled Frame Latency Meter (FLM) – which allows you to determine keyboard to display latency. Normally, this was done with a high-speed camera, a mouse, and an FPS game with a visible muzzle flash. The camera would capture the moment the mouse was clicked, and you would count the frames until the muzzle flash or other on-screen reaction appeared.

This utility does not require any special equipment and works with any AMD, Nvidia, or Intel GPU that supports DirectX 11 or newer. For capturing data, AMD GPUs use the Advanced Media Framework or AMF codec, while other GPUs use the DirectX Graphics Infrastructure or DXGI codec. FLM can generate detailed latency and effective frame-rate statistics, which can be exported to CSV files for further data analysis.

The way it works is clever: FLM measures latency by continuously capturing frames and comparing each one to the previous frame within a selected region. It then generates a mouse movement event using standard Windows functionality and waits for the frame contents to change. The time between the mouse movement and the detected frame change is recorded as the latency.

FLM is available as a free download for Windows 10 and 11 users via GPU Open or the official GitHub repository

Links:

• https://www.digitaltrends.com/computing/amd-frame-latency-meter/
• https://gpuopen.com/flm/
• https://github.com/GPUOpen-Tools/frame_latency_meter