Oleg Zabluda's blog
Friday, March 10, 2017
 
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Microsoft and Facebook. This week at the Open Compute Summit in Santa Clara, California, both hyperscalers announced different OCP designs for putting eight of NVIDIA’s Tesla P100 GPUs into a single chassis.
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Microsoft’s OCP contribution is known as HGX-1. Its principle innovation is that it can dynamically serve up as many GPUs to a CPU-based host as it may need – well, up to eight, at least. It does this via four PCIe switches, an internal NVLink mesh network, plus a fabric manager to route the data through the appropriate connections. Up to four of the HGX-1 expansion boxes can be glued together for a total of 32 GPUs. Ingrasys, a Foxconn subsidiary will be the initial manufacturer of the HGX-1 chassis.

The Facebook version, which is called Big Basin, looks quite similar. Again, P100 devices are glued together vial an internal mesh, which they describe as similar to the design of the DGX-1, NVIDIA’s in-house server designed for AI research. A CPU server can be connected to the Big Basin chassis via one or more PCIe cable. Quanta Cloud Technology will initially manufacture the Big Basin servers.
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https://www.top500.org/news/microsoft-facebook-build-dualing-open-standard-gpu-servers-for-cloud/
https://www.top500.org/news/microsoft-facebook-build-dualing-open-standard-gpu-servers-for-cloud/

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