Hi @terrass358,
Thank you for your message.
Please note that we can’t suggest a specific piece of hardware that we didn’t test internally.
Generic speaking, a good GPU is important for steps 1 and 2, but is not the only component used. Therefore, make sure you also have a good CPU, RAM and fast storage.
You can see how different components are used during different processing steps here:
here you can find other information about how PIX4Dmapper uses different components: