35 comments

[ 6.3 ms ] story [ 79.7 ms ] thread
They could rent out all that compute to subsidy the museum running costs.
I doubt distributed compute in a bunch of old i7s is worth much once you factor in the electricity cost
The RAM shortage is bad, but not that bad (yet).
You think it's bad now?

New 48GB DDR5 ECC UDIMM chips are retailing for £2.5K each in the UK.

Rather than rent it out (maybe some people would pay a few bucks a year for novelty web/mail hosting, but it's both too much and too little for most use cases, running the program of renting it probably eats up a lot of the revenue), maybe they could give compute time to universities for free, with the requirement that they provide some sort of display for museum visitors? There's probably some people with Monte Carlo simulations that could benefit from a lot of cores (if they get the M4 upgrade) while being on a student budget of $0. And if no one has requested it, they could run some BOINC project that has a nice visualization.
Yeah all good ideas, hope they take up some of these.
>The Cray-1 team hopes to fill the currently empty second half of the tower through a crowdfunding campaign to secure 70–80 additional M4 Mac Minis. The goal: create a cluster capable of ranking on the TOP500 supercomputers list.

Is ~100 Mac Minis really all it takes to get into the TOP500 these days?

I don't think so, the lowest from 2026 was still 2.66 PFlop/s, so they'd need thousands of Mac Minis.
Pretty sure not, especially since it requires 64-bit floating-point, so the GPU cores don't help. #500 right now is 2PF. One Mac won't do anywhere near 20 TF. Google tells me you can get 350GF of DP from one 10-core M4, so you might need 10,000 to get there. Then there's the network...
It would likely take a few more...

but for some history fun: https://www.top500.org/lists/top500/2003/11/

#3 on the list was "X" https://www.top500.org/system/173225/

Virginia Tech, self made 2,200 core PowerPC 970 as 1100 G5 Macs with Rmax at 10,280.00 GFlops (this is 0.012 PFlops).

... and for some more history about the Cray vs modern computers... http://www.roylongbottom.org.uk/Cray%201%20Supercomputer%20P...

    “In 1978, the Cray 1 supercomputer cost $7 Million, weighed 10,500 pounds and had a 115 kilowatt power supply. It was, by far, the fastest computer in the world. The Raspberry Pi costs around $70 (CPU board, case, power supply, SD card), weighs a few ounces, uses a 5 watt power supply and is more than 4.5 times faster than the Cray 1.” This refers to official average geometric mean results.

Back to TOP500... the 500th spot in June 2026: https://www.top500.org/lists/top500/list/2026/06/?page=5 is https://www.top500.org/system/179890/

It debuted in 2020 at #130 with Max at 2.66 PFlops.

A M4Pro mini today benches at 8.520 TFlops https://www.check-mac.com/en/product_benchmark-apple_mac_min...

From the article, the minis they are using:

    ... the developers can orchestrate the 64 active processing cores into a combined 1.3 teraflops of performance in their most recent tests.
That's a rather nice number... it will need about 2000x of the current systems to match the current 500th spot.

... however it would only take about 300 Mac M4Pro minis to get to the 500th spot today.

I know it's pedantic but this is a tribute or a re-envisioning but it's not a replica.
Well I was tricked so I think it's better to be accurate.
imagine showing even the first iphone to a Cray engineer in 1976

they'd lose their minds lol

(Cray-1 was 160 megaflops, smartphones are teraflops)

I am running a Cray Simulator at faster than full speed on a cheap Raspberry Pi knockoff called "Le Potato" and I spent the weekend vibecoding weather forecasting software for it as a tribute to NCAR.
They wouldn't loose their minds.

Pace of computer power increase was huge even back then, so imagining something like a powerful pocket computer was quite an easy thing to do.

I can easily imagine that these engineers would be disappointed by the first iPhone because, by interpolation, they expected something like that by the early 1990's.

Isn't the limit of supercomputing more about the data link speed than about the actual node compute speed?
Thats what I thought as well. I think its possible to use the Thunderbolt 1 port for that, but it would still be rather slow.
Well, you would need a crossbar switch to make that full NxN connection matrix. That's the hard part.
I don't get it, an actual Cray-1 getting refurbed would be much more exciting.
Can it run Cray-1 software? The architecture is completely different. I coudn't get that from the article. It seems like a large cluster of Macs arranged superficially to look like a Cray-1.
I spent the weekend setting up the open source Cray simulator on a really cheap SBC then vibecoding a weath forecasting application that uses the Cray's vector processor to process raw weather data.

Mine is a lot smaller, but it can run Cray workloads at full speed.

I spent the weekend vibecoding software for the Cray 1.

I installed the open source Cray Simulator on my "Le Potato" SBC, then installed UNICOS, then tasks Gemini with writing a weather forecasting program that ingests raw data from METAR weather stations and uses the simulator's vector processor to generate the forecast. It renders a nice little weather dashboard viewable in the terminal. A python http service runs outside the Cray and serves up a nice little web page with a virtual terminal that displays the dashboard.

Is it useful? No...but it's cool as hell. I plan to print up an enclosure for it along with a mini terminal with a 4" LCD to display the live dashboard. Then I'll have a nice little baby Cray to put on the shelf in my gameroom.

My little tribute to one of the first deployments of a Cray at NCAR.

How are the Mac minis so flat? Is that the actual shape or have they been gutted?
It's the original housing and dimensions. 2012 Mac Minis were around 20cm × 20cm square × 3.6cm high
Woah, neat. Looks like they were roughly the same shape until quite recently.
30 macs in a Cray looking case?
Reading Jurrasic Park, it as bit of fun hearing of how the island purchased multiple Cray super computer to help with genetic research. Fun even if its a bit of fiction.