[nSLUG] Atom vs Xeon

George N. White III gnwiii at gmail.com
Fri Apr 30 08:53:24 ADT 2010

"At an average power consumption of 3.2 watts, the Atom [Diamondville core]
is 19.5 times more power-efficient than the Xeon, which consumes 62.5 watts on
average. (When compared on a per-core basis, the Atom consumed 9.8 times less
power.) The Xeon, meanwhile, outperformed the Atom by 3.9 times (1.9
times per core).
"The large power cost of the Xeon is not justified by relatively modest
increases in
sustainable throughput," the researchers concluded."

The comparison suffers in practice because Xeon comes with multiple
cores -- the
researchers conclude:

"By integrating up to eight Diamondville cores into a single chip and
building a system
with two sockets, amortization once again highlights Atom efficiency.
As per our computed
cost... an integrated low-power multi-processors would be competitive
with a cost and
power efficiency advantage of 1.03× and 2.3× over the Xeon."

See: <http://www.extremetech.com/article2/0,2845,2362982,00.asp>

George N. White III <aa056 at chebucto.ns.ca>
Head of St. Margarets Bay, Nova Scotia

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