3 ms·

I did a double that when I realised that was Kilowatts not Watts. This chip uses more energy in an hour than the average household (in my country at least) does

• kllrnohj 6y ago
  It sounds like a lot but it almost isn't? Like this is ~50x bigger than an Nvidia A100, and the A100 pulls up to 400w. 50 * 400 ~= 20kW. So in terms of thermal density it's in-line with existing GPUs. That said, I'd be fascinated to see the cooling solution. Is it just a massive copper heatsink & a boatload of airflow? Typical approaches of using heatpipes to expand the heatsink won't really work with something this big after all. Or is it a massive waterblock with multiple inlets/outlets so it can hit up a stack of radiators? How do they get even mounting pressure across that large of an area?
  • mvanaltvorst 6y ago
    There's an image on their website[1], pretty huge water pumps. "To solve the 70-year-old problem of wafer-scale, we needed not only to yield a big chip, but to invent new mechanisms for powering, packaging, and cooling it. The traditional method of powering a chip from its edges creates too much dissipation at a large chip’s center. To prevent this, CS-2’s innovative design delivers power perpendicularly to each core. To uniformly cool the entire wafer, pumps inside CS-2 move water across the back of the WSE-2, then into a heat exchanger where the internal water is cooled by either cold datacenter water or air." [1]: https://cerebras.net/product/ https://cerebras.net/product/