[Beowulf] Register article on Epyc

[John Hearns]

https://www.theregister.co.uk/2017/06/20/amd_epyc_launch/

Interesting to see that these are being promoted as single socket systems.
For a long time the 'sweet spot' for HPC has been the dual socket Xeons.
I would speculate about single socket AMD systems, with a smaller form
facotr motherboard, maybe with onboard Infiniband.  Put a lot of these
cards in a chassis and boot them disklessly and you get a good amoutn of
compute power.

Also regarding compute power, it would be interesting to see a comparison
of a single socket of these versus Xeon Phi rather than -v4 or -v5 Xeon.

The encrypted RAM modes are interesting, however I can't see any use case
for HPC.
Unless you are running a cloudy cluster where your customers are VERY
concerned about security.  Of course there are such customers!
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