Professor Simon McIntosh-Smith

lots and lots of equipment.

Now, we don't tend to have the flashing lights anymore like we used to on supercomputers of old, but instead you'll see there are lots and lots of pipes, and these are pipes, not cables, and they're blue and red, and that kind of gives you a hint as to what they're for.

Now, all modern supercomputers at this scale are direct liquid cooled, so they produce so much heat, so they're using so much power.

But the only way to cool them down effectively and keep the thing very compact is with water.

So we actually have, this is water flowing around the system.

It's a water glycol mix, actually.

But that's keeping it cool.

In fact, the blue pipes are the cool water coming in from outside.

And you'll see where that comes from later on.

And the red pipes are the hot water coming back off the equipment, which goes back out to be cooled back down again.

Well, even the blue pipe is, you can, you can touch it.

Even the blue pipes are warm.

So in some ways it's actually warm water cooling, which I know sounds a bit like an oxymoron, but it is warm water.

So it comes in warm, but it comes out even warmer.

And it's just that temperature difference is the thing that's providing the cooling effect.

Yes.

So these vertical, these big vertical metal structures, which if I were to pull one of those out, each one of those would have lots of GPUs on it.

And the GPUs are the engine of an AI supercomputer.

And there are eight GPUs on each one of those blades.

And there are 55 blades in each one of these cabinets.