Live data from Hacker News

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

youtube.com

21–30 of 93 posts

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

#21

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.

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

#22
post #9

Earlier quoted context omitted.

and cooling! Imagine the heat sink on that thing. Would look like a cast-iron Dutch oven :)

24kW translates to like 32hp, so you could imagine this thing with a liquid cooling loop hooked up to something that looks like a car radiator.

24kW is on the lower end of a home heating gas boiler.

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

#23
post #10

Interesting. I know there's a lot of attempts to hobble China by limiting their access to cutting edge chips and semiconductor manufacturing technology, but could something like this be a workaround for them, at least for datacenter-type jobs? Maybe it wouldn't be as powerful as one of these, due to their less capable fabs, but something that's good enough to get the job done in spite of the embargoes.

What do you mean by "this", and how does it work around the restrictions? Do you mean just making bigger chips instead of shrinking the transistors?

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

#25
post #17

It has its own programming language CSL https://www.cerebras.net/blog/whats-new-in-r0.6-of-the-cereb... "CSL allows for compile time execution of code blocks that take compile-time constant objects as input, a powerful feature it inherits from Zig, on which CSL is based. CSL will be largely familiar to anyone who is comfortable with C/C++, but there are some new capabilities on top of the C-derived basics." https://g…

It is oddly reminiscent of the Thinking Machines CM-1/2 series, but with CSL as the official language instead of Lisp.

And far fewer blinking lights.

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

#27

- 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???

Is that 150GB/s between elements that expect to run tightly coupled processes together? Maybe the bandwidth between chips is less important.

I mean, in a cluster you might have a bunch of nodes with 8x GPUs hanging off each, if this thing replaces a whole node rather than a single GPU, which I assume is the case, it is not really a useful comparison, right?

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

#28
post #3

Not trying to sound critical, but is there a reason to use 4B,000 vs 4T?

My guess is the titles get auto adjusted by Hacker News, but the script that does it doesn’t have logic for a trillion and only goes up to a billion, hence the weirdness of a string match and replace

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

#30

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)

I want this woman running my postAI-apocalypse hardware research lab.
Post reply on HN