The 2D GPU solver is part of the Professional and Unlimited editions of Flood Modeller. Request a price list or contact sales@floodmodeller.com for further information on pricing.
The GPU solver requires a CUDA enabled NVIDIA GPU card with computing capability (cc) of 5.2 or higher. You can find your GPU details within the NVIDIA Control Panel and check the computing capability on the NVIDIA website.
You will also need your NVIDIA drivers to be updated to version 461.33 or later. You can update your drivers from Help menu within the NVIDIA Control Panel.