TetraMem and commercialization

1:19:12memorisser construction for high temperature plus the concept of uh in-memory computing >> together. Yeah. >> Um >> there's a there because it's it's not just one or the other. Both things give you now the single chip that can work in high temperature that can you know run comparative uh comparably for a long time >> faster >> faster um and can do both your compute and memory at the same time. >> Exactly. And of course the authors have made a startup. >> Okay. Of course there's a startup called Tetrame. It was co-founded by Joshua

1:19:52Yang who's the PI of the paper that we're talking about along with um Chiang Fe Xia and the other authors. Um and it's already working to commercialize this crossbar memorist device to replace power hungry GPUs, right? >> They're getting acquired immediately. >> Yeah. No, especially with this >> immediately. >> Now, let's talk about what this has to do with data centers in space. Okay. >> Okay. Elon wants to put data centers in space. Why? because it's probably possible and I mean it helps SpaceX obviously and it's not just SpaceX that's trying to do this right Google is trying to do this there's a bunch of startups that are trying to do this and

1:20:32it's looked impossible for a very very long time because of a sort of fundamental physics quandry is because these GPUs are highly reliant on cooling mechanisms because the GPUs can't withstand and a lot of heat. That's why whenever you hear about like all these data centers taking up um local water, the water is being used to cool down the GPUs effectively. At the end of the day, that's most of the water being used is just to extract heat from these GPUs and put it out into the environment. That's why the data centers, the climate around the data centers, there's like a microclimate that's created and the

1:21:14temperature gets raised and then all the environmental people are like, "Okay, what's happening in the flora and fauna?" which is completely reasonable, right? I don't want to hurt like the planet and especially the planet that's right around those data centers. So, >> let's talk about how treat heat transfer happens. There's three types of heat transfer. Okay. There's convection, conduction, and radiation. Convection is hot stuff moves around to the cold part. >> Mhm. >> And then the cold part goes down to where the hot hot stuff is. That's how like if you put a pot on a stove, the the water gets heated uniformly because the hot packets are moving and the cold packets are moving. So that's convection. Conduction is [snorts] the

1:21:56atoms themselves jiggling around to conduct heat from one spot to the other. That's why the handle gets hot. And then finally, the most inefficient part is radiation, which is literally photons coming out. M like the reason why a fire is hot, but if you put your hand in front of the fire, all of a sudden you don't feel that hot is because you've stopped photons from getting to your face. Okay? And that's why like when when a shade is so important because now the photons, the infrared photons from the sun are not hitting you and then all of a sudden you feel like 10 or 20° cooler. >> You're right next to the sun, right? The shade is only shading your part. Well,

1:22:37the reason why it's so effective is because the photons aren't getting to you. The convection and the conduction still is, right? The the hot pockets of air are still moving towards you, but the photons are not. Okay? So, that those are the three types of heat transfer. Now, terrestrial data centers, they mostly use the first two. Mostly, it's convection. That's why you've got water pipes going through because the water gets hot and then you move the water to a colder spot. It dumps the heat and you cycle it back. back and so on and so forth, right? Um, terrestrial