3 ms·
nabla9 said "one Grace Hopper" not "one GH200 pod". Actually, DGX GH200 seem to come in different sizes, something that I can't find clearly stated on Nvidia's
by versteegen 3y ago
nabla9 said "one Grace Hopper" not "one GH200 pod".
Actually, DGX GH200 seem to come in different sizes, something that I can't find clearly stated on Nvidia's website, but what I do see are entirely inconsistent specs. I'm thinking they've changed it a few times.
https://developer.nvidia.com/blog/announcing-nvidia-dgx-gh200-first-100-terabyte-gpu-memory-system/ https://developer.nvidia.com/blog/announcing-nvidia-dgx-gh20... describes the DGX GH200 as:
-256 NVIDIA Grace Hopper Superchips (1 CPU + 1 GPU)
-each Grace CPU has 480 GB LPDDR5 CPU memory
-each H100 GPU has 96 GB of HBM3
-each GPU can access all of the CPU and GPU memory in the whole system (144TB), at 900 GBps
At https://www.nvidia.com/en-us/data-center/dgx-gh200/ https://www.nvidia.com/en-us/data-center/dgx-gh200/ (linked to from the DGX page from the website) which has a Datasheet pdf they say the DGX GH200 has:
-32 NVIDIA Grace Hopper Superchips (1 CPU + 1 GPU)
-each Grace CPU has 72 "ARM Neoverse V2 Cores with SVE2 4X 128"
-each GPU can access "19.5TB" shared memory
-that's 624GB per superchip, which is weird. I expect it's actually 96GiB HBM3 + 512GiB LPDDR, a total of 19456GiB = 19.0TiB
And other people have found completely different specs elsewhere on the website!