TechTakes

I joined the Microsoft climate solutions team, I think doing so has crushed all my hopes. That team is doing small things like "let's all go plastic free for July!" Top 20 company in the world and the best we can do is go plastic free for a month? Meanwhile MSFT is not on course to meet their own climate goal by 2030

“It only uses 5x as much energy as a regular search! Think of how much energy YOU’RE using with searches!” Okay, so you’re just using 5x as much energy for worse results? And also probably doing it more often than people who just use a normal search engine, because they don’t expect the search engine to talk to them. I’ve never understood how that was supposed to be an exoneration for it, even without taking into account that nobody ever seems to know whether or not that figure includes energy spent on training.

there’s this type of reply guy on fedi lately who does the “well actually querying LLMs only happens in bursts and training is much more efficient than you’d think and nvidia says their gpus are energy-efficient” thing whenever the topic comes up

This kind of person (also happened a lot with cryptocurrencies) always goes 'that isn't how it works, this isn't a problem' then doesn't explain what the mistake is you are supposed to have made, and then a few weeks/months/days/search later it is revealed that it was how it works and it is a huge problem. And it is so annoyingly common im very happy with the moderation here.

I live in Ireland and these companies keep trying to build data centres here even though they are using way too much of our energy as is :)) From an Irish environmental org:

A few years ago when researching new gas power stations in Ireland, we noticed that many of these developments were being proposed alongside another type of infrastructure: data centres. [...] As of June 2023, there are 82 operational data centres in Ireland, with another 14 under construction. Additionally, 40 data centres have had planning permission approved with another 12 awaiting a decision. [...] Data centres account for 18% of all electricity use in Ireland [...] This is putting unprecedented strain on the electricity grid, with grid operator Eirgrid estimating that data centres may account for up to 27% of Ireland’s electricity demand by 2028. The Commission for Regulation of Utilities (CRU) in Ireland has noted a risk of rolling electricity blackouts...

The last part is absolutely false. The Nvidia H100 TDP is like 700W, though ostensibly configurable. The B200 is 1000W. The AMD MI300X is 750W.

They also skimp on RAM with many SKUs so you have to buy the higher clocked ones.

They run in insane power bands just to eek out a tiny bit more performance. If they ran at like a third of their power, I bet they would be at least twice as power efficient, and power use scales over nonlinearly with voltage/clock speed.

But no, just pedal to the metal. Run the silicon as hard as it can, and screw power consumption.

Other AI companies like Cerebras are much better, running at quite sane voltages. Ironically (or perhaps smartly), the Saudis invested in them.

I always thought data centers ran clean and dirty loops of cooling (as far as computers are concerned).
The clean loop has all the chemicals and whatnot to keep cooling blocks and tubing "safe". The dirty side is just plain old water. And a big heat exchanger transfers the heat from the clean (hot) loop to the "dirty" (cold) side.
Is there really that much pollution in that? Can't be worse than rain going through storm drains or whatever.

But AI does use a phenomenal amount of power.
And, IMO, it's a problem compared to the lack of value people are getting from AI.
The new Blackwell B200 consumes 1.2kw of power, and will produce 1.2kw of heat.
A cooling system with a COP of 5 needs to consume 240w to dissipate this.
The backplane for the B200 holds 8 of these GPUs in a 10 RU space, and with overheads will peak 14.3kw (cooling would be 3kw consumption).
So, a 42u data center rack with 3 of these, supporting hardware and UPS efficiencies (80%) is going to be 52kw (+10kw cooling). 62kw total, which is like 4 homes drawing their full load all the time.

I hope they finally find an application for AI, instead of just constantly chasing the dragon with more training, more parameters, more performance etc.