Download AMD Frame Latency Meter Download

FLM’s advanced features and user-friendly interface make it the perfect tool for gamers, professionals and anyone who wants to optimize the overall gaming experience. The entire latency of the mouse response time is measured, from the moment the mouse is moved to the moment the frame appears on the screen.

FLM includes options to use a selection of frame capture codecs such as the Advanced Media Framework (AMF) codec, optimized for AMD GPUs, or the Desktop Duplication (DXGI) screen capture codec for use on any GPU. This makes it available to a wide range of users using Windows platforms.

The tool provides detailed statistics for latency and “effective framerate” measurements, which are exported to a csv file for further analysis. This feature is especially useful for gamers and professionals who require accurate measurements for their work.

Each user has different preferences and requirements. Therefore, FLM allows users to configure hotkeys to enable measurements, set the screen capture area, measurement formats, and more.

Characteristics

• Measurements of response time latency from mice
• Detailed, exportable latency statistics
• AMF and DXGI capture codec options
• Easy to customize with hotkey configuration for measurements
• Sequential frame recording via configurable keys
• Screen area configuration
• Compatible with Windows platforms

How it works

The app takes a measurement using the following method:

• The app continuously captures the frames, and compares each frame with the previous one within the selected area.
• The app then generates a mouse movement event (this is standard Windows functionality) and waits for the frame content to change.

The time between the generated mouse movement and the detected frame change is the latency.

16 latency measurements are averaged per row to get a cleaner value, but given the data it is possible to average as many measurements as required to get an even more precise measurement.

One of the unique features of FLM’s mouse latency measurement tool is that muzzle flash from bullets is not required to measure latency. This means it is possible to quickly make as many measurements as required without worrying about running out of ammo. As a result, the application can work autonomously to collect an unlimited number of measurement samples, achieving a much higher accuracy.

Prerequisites

• Windows 10 or Windows 11
• The AMF codec requires AMD Radeon Software Adrenalin Edition 24.6.1 (24.10.21.01) or later

Quick start

Requirements Windows 10 or higher with DX11 and DX12 support, games should be run in windowed mode for the DXGI recording codec to work. AMF can run in full screen mode and high frame rates.

Step 1: Configure your primary monitor to run the game on.

• Set your monitor to use free sync or get it set to a suitable refresh rate, try starting at 60Hz first.

Step 2: Run flm.exe

• Press the right Alt key to see the capture area bounding box.
• Note: The bounding box will only appear if the game is running in windowed mode.
• Adjust the placement of the game scene so that the FLM capture area is placed in an area where the scene transitions from dark to light when the mouse is moved horizontally.

Step 3: Run the game.

• Adjust the placement of the game scene so that the FLM capture area is placed in an area where the scene transitions from dark to light when the mouse is moved horizontally.

Step 4: Select key sequence for starting measurements (default is ALT+T).

• Wait for the capture process to start, it may take a few seconds to start as FLM process data. You should see the mouse move left and right in rapid succession while the application records latency measurements. Some games may require you to hold down the mouse keys to move the mouse left and right. If the mouse movements are too small, adjust the scene position or change the mouse steps in flm.ini using “MouseHorizontalStep”.
• If you see no measurements or the measurements are slow, stop the measurements by pressing Alt+T and try a different scene location with better contrast between the left and right capture areas. If that fails, review the setting adjustment section for additional details on how to change the default settings.
• By default, FLM starts in “RUN” working mode, where output shows waiting time[ms] and latency[frames] average of 16 consecutive measurements. The current working mode can be changed for the current session via the settings dialog, or a new default working mode can be set by changing the INI file
• fps = xxx.x | ……………. | wait time = xxx.x | frames = x.xxx
• A running series of measurements will indicate the rate at which these latency measurements occur. If it doesn’t move or is slow – stop the measurements (step 5), change the game scene location and try again. If you change the scene while the measurement is still running, the average latency value will not be correct until it reaches a stable value.

Step 5: Select stop measurements and review the output.

• Start measurements.
• fps = xxx.x | ……………. | wait time = xxx.x | frames = x.xxx
• Stop measurements.

Notes

• When using the DXGI codec, run the program on the primary screen
• Turn off your monitor’s HDR mode
• Remote desktop is not supported
• Disable motion blur and other settings that may affect mouse smoothing