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Immersion cooling to offset data centers’ massive power demands gains a big booster in Microsoft

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LiquidStack does it. So does Submer. They’re both dropping servers carrying sensitive data into goop in an effort to save the planet. Now they’re joined by one of the biggest tech companies in the world in their efforts to improve the energy efficiency of data centers, because Microsoft is getting into the liquid-immersion cooling market.

Microsoft is using a liquid it developed in-house that’s engineered to boil at 122 degrees Fahrenheit (lower than the boiling point of water) to act as a heat sink, reducing the temperature inside the servers so they can operate at full power without any risks from overheating.

The vapor from the boiling fluid is converted back into a liquid through contact with a cooled condenser in the lid of the tank that stores the servers.

“We are the first cloud provider that is running two-phase immersion cooling in a production environment,” said Husam Alissa, a principal hardware engineer on Microsoft’s team for datacenter advanced development in Redmond, Washington, in a statement on the company’s internal blog. 

While that claim may be true, liquid cooling is a well-known approach to dealing with moving heat around to keep systems working. Cars use liquid cooling to keep their motors humming as they head out on the highway.

As technology companies confront the physical limits of Moore’s Law, the demand for faster, higher performance processors mean designing new architectures that can handle more power, the company wrote in a blog post. Power flowing through central processing units has increased from 150 watts to more than 300 watts per chip and the GPUs responsible for much of Bitcoin mining, artificial intelligence applications and high end graphics each consume more than 700 watts per chip.

It’s worth noting that Microsoft isn’t the first tech company to apply liquid cooling to data centers and the distinction that the company uses of being the first “cloud provider” is doing a lot of work. That’s because bitcoin mining operations have been using the tech for years. Indeed, LiquidStack was spun out from a bitcoin miner to commercialize its liquid immersion cooling tech and bring it to the masses.

“Air cooling is not enough”

More power flowing through the processors means hotter chips, which means the need for better cooling or the chips will malfunction.

“Air cooling is not enough,” said Christian Belady, vice president of Microsoft’s datacenter advanced development group in Redmond, in an interview for the company’s internal blog. “That’s what’s driving us to immersion cooling, where we can directly boil off the surfaces of the chip.”

For Belady, the use of liquid cooling technology brings the density and compression of Moore’s Law up to the datacenter level

The results, from an energy consumption perspective, are impressive. The company found that using two-phase immersion cooling reduced power consumption for a server by anywhere from 5 percent to 15 percent (every little bit helps).

Microsoft investigated liquid immersion as a cooling solution for high performance computing applications such as AI. Among other things, the investigation revealed that two-phase immersion cooling reduced power consumption for any given server by 5% to 15%. 

Meanwhile, companies like Submer claim they reduce energy consumption by 50%, water use by 99%, and take up 85% less space.

For cloud computing companies, the ability to keep these servers up and running even during spikes in demand, when they’d consume even more power, adds flexibility and ensures uptime even when servers are overtaxed, according to Microsoft.

“[We] know that with Teams when you get to 1 o’clock or 2 o’clock, there is a huge spike because people are joining meetings at the same time,” Marcus Fontoura, a vice president on Microsoft’s Azure team, said on the company’s internal blog. “Immersion cooling gives us more flexibility to deal with these burst-y workloads.”

At this point, data centers are a critical component of the internet infrastructure that much of the world relies on for… well… pretty much every tech-enabled service. That reliance however has come at a significant environmental cost.

“Data centers power human advancement. Their role as a core infrastructure has become more apparent than ever and emerging technologies such as AI and IoT will continue to drive computing needs. However, the environmental footprint of the industry is growing at an alarming rate,” Alexander Danielsson, an investment manager at Norrsken VC noted last year when discussing that firm’s investment in Submer.

Solutions under the sea

If submerging servers in experimental liquids offers one potential solution to the problem — then sinking them in the ocean is another way that companies are trying to cool data centers without expending too much power.

Microsoft has already been operating an undersea data center for the past two years. The company actually trotted out the tech as part of a push from the tech company to aid in the search for a COVID-19 vaccine last year.

These pre-packed, shipping container-sized data centers can be spun up on demand and run deep under the ocean’s surface for sustainable, high-efficiency and powerful compute operations, the company said.

The liquid cooling project shares most similarity with Microsoft’s Project Natick, which is exploring the potential of underwater datacenters that are quick to deploy and can operate for years on the seabed sealed inside submarine-like tubes without any onsite maintenance by people. 

In those data centers nitrogen air replaces an engineered fluid and the servers are cooled with fans and a heat exchanger that pumps seawater through a sealed tube.

Startups are also staking claims to cool data centers out on the ocean (the seaweed is always greener in somebody else’s lake).

Nautilus Data Technologies, for instance, has raised over $100 million (according to Crunchbase) to develop data centers dotting the surface of Davey Jones’ Locker. The company is currently developing a data center project co-located with a sustainable energy project off the coast of Stockton, Calif.

With the double-immersion cooling tech Microsoft is hoping to bring the benefits of ocean-cooling tech onto the shore. “We brought the sea to the servers rather than put the datacenter under the sea,” Microsoft’s Alissa said in a company statement.

Ioannis Manousakis, a principal software engineer with Azure (left), and Husam Alissa, a principal hardware engineer on Microsoft’s team for datacenter advanced development (right), walk past a container at a Microsoft datacenter where computer servers in a two-phase immersion cooling tank are processing workloads. Photo by Gene Twedt for Microsoft.

Lyron Foster is a Hawaii based African American Musician, Author, Actor, Blogger, Filmmaker, Philanthropist and Multinational Serial Tech Entrepreneur.

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Haitian Activist Brings Awareness To Spate Of Violence Rattling Country

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NPR’s Michel Martin speaks with Jimmy Jean-Louis, a Haitian activist and actor who has been calling attention to the recent surge of violence and kidnappings in his country.

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Consumer agency warns against Peloton Tread+ use, as company pushes back

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Almost exactly a month ago, Peloton CEO John Foley wrote an open letter about the the company’s treadmill. “I’m reaching out to you today because I recently learned about a tragic accident involving a child and the Tread+, resulting in, unthinkably, a death,” it begins. “While we are aware of only a small handful of incidents involving the Tread+ where children have been hurt, each one is devastating to all of us at Peloton, and our hearts go out to the families involved.”

Today, the U.S. Consumer Product Safety Commission issued a warning, telling users to stop using the Tread+. Citing 39 incidents, included the aforementioned death, the CPSC writes, “The Commission has found that the public health and safety requires this notice to warn the public quickly of the hazard.”

Peloton followed up with its own strongly worded statement writing, “The company is troubled by the Consumer Product Safety Commission’s (CPSC) unilateral press release about the Peloton Tread+ because it is inaccurate and misleading. There is no reason to stop using the Tread+, as long as all warnings and safety instructions are followed.”

The commission’s warning includes multiple injuries involving small children and a pet. Specifically, the note calls for users with children at how to cease using the product, a more stern warning than the initial suggestions outlined by Foley back in in March, who at the time told users to keep children and pets away from the system and store the device out of reach after using. Peloton has since added that there have been 23 incidents involving children, 15 with objects and, as the CPSC noted, one with a pet. The company added that it had not revealed the specifics previously out of privacy concern.

“If consumers must continue to use the product, CPSC urges consumers to use the product only in a locked room, to prevent access to children and pets while the treadmill is in use,” the organization notes. “Keep all objects, including exercise balls and other equipment, away from the treadmill.”

For its part, the connected fitness maker adds,

Peloton invited CPSC to make a joint announcement about the danger of not following the warnings and safety instructions provided with the Tread+, and Foley asked to meet directly with CPSC. CPSC has unfairly characterized Peloton’s efforts to collaborate and to correct inaccuracies in CPSC’s press release as an attempt to delay. This could not be farther from the truth. The company already urged Members to follow all warnings and safety instructions. Peloton is disappointed that, despite its offers of collaboration, and despite the fact that the Tread+ complies with all applicable safety standards, CPSC was unwilling to engage in any meaningful discussions with Peloton before issuing its inaccurate and misleading press release.

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Why it’s not surprising to see nine-figure AI rounds 

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Welcome back to The TechCrunch Exchange, a weekly startups-and-markets newsletter. It’s broadly based on the daily column that appears on Extra Crunch, but free, and made for your weekend reading. If you want it in your inbox every Saturday morning, sign up here

Ready? Let’s talk money, startups and spicy IPO rumors.

This week, Scale AI raised a $325 million Series E. The company, as TechCrunch has written, works in the data labeling space. And it has been on a fundraising tear over the last few years. In 2019 TechCrunch wrote about how the company’s then-22-year-old CEO had put together a $100 million round. Then in December of 2020, it raised $155 million at a roughly $3.5 billion valuation. Now it’s worth more than $7 billion.

Impressive, yeah? Well, as I learned earlier this week, AI startups in general are having one hell of a year. From the start of 2021 to April 12th, there were 442 AI-startup deals in the U.S. worth $11.65 billion, according to PitchBook data. And the recent Microsoft-Nuance AI deal may accelerate things even more.

Sapphire Ventures’ Jai Das weighed in on the AI venture market for The Exchange. He answered our question regarding how competitive the space was in the first quarter by saying that “investment activity in AI/ML startups has been absolutely insane” during the first quarter.

Per Das: “AI/ML startups are routinely getting 5-6 term sheets from top-tier VC firms and they are able to raise their financings at 150-250X of current ARR.”

Chew on that for a moment. We’ve seen public software multiples reach new heights in the last year, but even for aggressive startup rounds, those are some bonkers numbers. Imagine an AI-focused startup with $1 million in recurring revenue being valued at a quarter of a billion dollars. Damn.

But what about pace among AI investing? We’ve heard that the time from a round opening to its closing among many startups has been compressed and compressed again. Das helped explain the situation, saying in an email that “most firms are completing their due diligence way before the financing actually happens,” which means that there is “no need to do any due diligence during the financing.”

That actually makes some sense? If rounds are largely preemptive — something that Das underscored later on in his comments — you have to do pre-diligence. Otherwise you’ll always be investing blind or missing out on deals due to other firms moving more quickly.

This week The Exchange also dug into the broader domestic venture capital market, with a special focus on seed deals, and the super late-stage investments that dominate headlines. A comment on the earlier-stages of venture investing that just missed our piece on the matter came from Jeff Grabow, EY’s U.S. Venture Capital lead.

In his comments on pre-seed, seed and post-seed deals, something stood out to us — a prediction of sorts. Here’s Grabow:

[Q1 2021] was a strong quarter for pre-seed funding when you compare it to prior years, and we expect the overall environment to remain strong given the abundance of capital available and plethora of investable themes that tap into new markets via technological solutions. It paints a rosy picture for the post-COVID environment.

That tracks with our internal estimates. Q1 2021 was so hot for at least American venture capital activity (expect more international coverage soon) that it seems likely that the year itself will be a record in many respects. Provided that things don’t slow too much, records will be broken. And here Grabow flat-out anticipates a pretty attractive climate for venture after COVID-19 is behind us.

So, records will be broken. The question is by how much.

More notes on Coinbase’s direct listing

Not to whomp the equestrian deceased too much, but I have a few more notes for you on the Coinbase direct listing.

Public.com, the Robinhood consumer trading rival, helped The Exchange better understand just how much retail interest there was in the stock. Per its ever-present spokesperson Mo, on April 14th, Coinbase “was the most popular stock on public,” measured by number of transactions. And perhaps more notably, on the same day “social activity (measured by the number of posts) increased by 70% compared to the day prior.”

I do not know how long the consumer trading boom can last, but that’s a pretty impressive set of metrics.

Similarweb also had a few data points to share, including that visits to coinbase.com reached 86.4 million in January. Hot damn. And during that month new visitors bested returning visitors. That data helps explain how Coinbase wound up with the epic first quarter that it did. Now the question is if it can keep up its bull run or, frankly, if consumer interest in trading in crypto specifically will outlast the equities trading boom or not.

Coinbase Series D lead investor Tom Loverro, who we’ve mentioned a few times this week, including on the podcast, said that we’re still merely in the second inning of crypto. So expect these topics to keep coming up again and again. And again.

Various and sundry

Trying to actually stick to our word count target for once, here are some final notes on the IPO market from the week.

First, the AppLovin IPO did not go according to plan. After modestly pricing at $80 per share, the middle of its range, the mobile-app focused tech company saw its value fall during its first two days’ trading. It’s now worth $61 per share as of the end of Friday.

The Exchange spoke with AppLovin CFO Herald Chen on its IPO day. Chatting with the finance executive, our read from the conversation is that the company could accelerate its acquisition game more now that it is public. Having a liquid stock means that it can be even more acquisitive than before. And AppLovin claims that it can buy companies, run them through its business process, and juice their revenues per its S-1 filing.

If that bears out, the public markets may be giving the company a bit too hard of a time. It was a bit odd to see a software company struggle post-IPO in today’s climate.

Chen also told The Exchange that his firm didn’t see any pushback regarding its multi-class share structure during its roadshow. The multi-class share miasm is something I’ve written about with our own Ron Miller. The CFO did note that no single person has complete control of the company, even with several different classes of equity with disparate voting rights. That matters, frankly.

We’ll keep tabs on AppLovin as it trades. (Our earlier coverage of its numbers is here.)

Finally, autonomous trucking company TuSimple went public this week, and Similarweb filed to go public. We’re also watching the broader IPO market as UiPath either raises its price range or note. We have a guess on that score.

And just as the week was closing, Squarespace dropped its S-1. Notes here with more to come.

Good vibes and nothing other than the best from here,

Alex

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