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Yeah not sure if there's a major difference.

Is it just to identify the cloud providers? 7J13 mentioned here is Oracle.

Mine don’t boost quite as high as a 7713, which might be a binning difference or a power saving measure. They were (relatively) cheap, so I have no complaints.

There is a list somewhere on STH of all the variant SKUs. The second letter does indeed indicate which cloud they were sold for.

Yes but not exactly. 7B13 was sold to both GCP and Alibaba. There are 2 variants of it with GCP having 60 cores and no turbo and Alibaba 64 and turbo. Looking at the part # won’t tell you which variant

They probably have one or more provider-specific networking bridges in them for zero-copy latched handling of packets into the machine's provider-specific SDN hardware (for accelerating SAN, IDS, etc.)

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