Live data from Hacker News

4T transistors, one giant chip (Cerebras WSE-3) [video]

youtube.com

41–50 of 93 posts

Re: 4T transistors, one giant chip (Cerebras WSE-3) [video]

#41

Better sell all nvidia stocks. Once these chips are common there is no need anymore for GPUs in training super large AI models.

This chip does not outperform NVIDIA on key metrics. Economics of scale are unfavorable. Software is exotic.

I trust that gamers will outlast every hype, be it crypto or AI.

Re: 4T transistors, one giant chip (Cerebras WSE-3) [video]

#42

Better sell all nvidia stocks. Once these chips are common there is no need anymore for GPUs in training super large AI models.

Ex Cerebras engineer. In my opinion, this is not going to be the case. The WSE-2 was a b** to program and debug. Their compilation strategy is a dead end, and they invest very little into developer ease. My two cents.

Re: 4T transistors, one giant chip (Cerebras WSE-3) [video]

#44

- Interconnect between WSE-2's chips in the cluster was 150GB/s, much lower than NVIDIA's 900GB/s. - non-sparse fp16 in WSE-2 was 7.5 tflops (about 8 H100s, 10x worse performance per dollar) Does anyone know the WSE-3 numbers? Datasheet seems lacking loads of details Also, 2.5 million USD for 1 x WSE-3, why just 44GB tho???

>> why just 44GB tho???

You can order one with 1.2 Petabytes of external memory. Is that enough?

"External memory: 1.5TB, 12TB, or 1.2PB"

https://www.cerebras.net/press-release/cerebras-announces-th...

"214Pb/s Interconnect Bandwidth"

https://www.cerebras.net/product-system/

Re: 4T transistors, one giant chip (Cerebras WSE-3) [video]

#46
post #31

According to the company, the new chip will enable training of AI models with up to 24 trillion parameters. Let me repeat that, in case you're as excited as I am: 24. Trillion. Parameters. For comparison, the largest AI models currently in use have around 0.5 trillion parameters, around 48x times smaller. Each parameter is a connection between artificial neurons . For example, inside an AI model, a linear layer that…

> that have only 4x to 20x fewer connections that the human brain

So only 4-20 of these systems are necessary to match the human brain. No?

Re: 4T transistors, one giant chip (Cerebras WSE-3) [video]

#47

Reposting the CS-2 teardown in case anyone missed it. The thermal and electrical engineering is absolutely nuts: https://vimeo.com/853557623 https://web.archive.org/web/20230812020202/https://www.youtu... (Vimeo/Archive because the original video was taken down from YouTube)

As always, IBM did it first: https://www.righto.com/2021/03/logic-chip-teardown-from-vint...

Re: 4T transistors, one giant chip (Cerebras WSE-3) [video]

#48

Reposting the CS-2 teardown in case anyone missed it. The thermal and electrical engineering is absolutely nuts: https://vimeo.com/853557623 https://web.archive.org/web/20230812020202/https://www.youtu... (Vimeo/Archive because the original video was taken down from YouTube)

20,000 amps 200,000 electrical contacts 850,000 cores and that's the "old" one. wow.

This is something I'm clueless about and can't really understand. They say this is 24kW hungry. How does CPU power consumption really work on electrical level, what warrants that much power, even for regular CPUs? Like, from the basics level.. is it resistance of the material with frequency of switching or what is really going on there? Where does the power go on such a relatively small surface?

edit: thanks people, makes sense now!

Re: 4T transistors, one giant chip (Cerebras WSE-3) [video]

#49

If you were to add up all transistors fabricated worldwide, up until , such that total roughly matches the # on this beast, what year would you arrive? Hell, throw in discrete transistors if you want. How many early supercomputers / workstations etc would that include? How much progress did humanity make using all those early machines (or any transistorized device!) combined?

Rough guess: mid 1980s

4004 from the 1970s used 2300 transistors, so it would have needed to sell billions.

Pentium from 1990s had 3M transistors, so it could hit our target by selling a million units.

I'm betting (without much research) that the Pentium line alone sold millions, and the industry as a whole could hit those numbers about 5 years earlier.

Re: 4T transistors, one giant chip (Cerebras WSE-3) [video]

#50
post #44

- Interconnect between WSE-2's chips in the cluster was 150GB/s, much lower than NVIDIA's 900GB/s. - non-sparse fp16 in WSE-2 was 7.5 tflops (about 8 H100s, 10x worse performance per dollar) Does anyone know the WSE-3 numbers? Datasheet seems lacking loads of details Also, 2.5 million USD for 1 x WSE-3, why just 44GB tho???

>> why just 44GB tho??? You can order one with 1.2 Petabytes of external memory. Is that enough? "External memory: 1.5TB, 12TB, or 1.2PB" https://www.cerebras.net/press-release/cerebras-announces-th... "214Pb/s Interconnect Bandwidth" https://www.cerebras.net/product-system/

I can't find the memory bandwidth to that external memory. Did they publish this?
Post reply on HN