Harnessing the power of graphics processing units (GPUs) can significantly accelerate a Haystack question answering system. GPUs are ideal for deep learning's parallelizable operations, such as those found in transformer-based language models, making them a crucial component in the field's advancements. By leveraging GPUs, users can speed up their Haystack pipelines, including readers, retrievers, and indexing processes, resulting in faster inference times and improved overall performance. The use of GPUs can be achieved through Google Colab or Amazon Web Services (AWS), both of which provide accessible options for accelerating workflow. With the ability to harness GPU power, users can significantly improve their Haystack pipelines, making it a practical necessity for large-scale projects.