What kind of hardware are businesses using to run Blockchain on?

[Trenton30]

I know most bitcoin miners are focused on a GPU rig. They do whatever they can to get as much power out of those GPUs with the proper cooling apparatus and so on and so forth.

Now, let's take a bank as an example, a large bank. They've got the money and the resources. They also have a ton of data to support.

What kind of hardware would be needed to run their system? How many GPUs? Are they thinking about it?

I am interested in the hardware they have to implement to scale for their business purposes. Or is the hardware at that level not important? Thoughts?