How many GPUs does it take to run ChatGPT?

Could you elaborate on the computational requirements for running ChatGPT, specifically in terms of the number of Graphics Processing Units (GPUs) required? I understand that ChatGPT is a complex language model that relies on significant computational power, but I'm curious to know if there's a ballpark estimate of the GPU resources necessary to effectively operate such a system. Given the ever-evolving nature of hardware and AI technologies, is there a general consensus among experts regarding the minimum or recommended number of GPUs for ChatGPT's operation?