Vol 123 Issue 2 2008-05-12 Article 19734 from section "Servers"

It's All Possible with Sun's UltraSPARC T2 Processor with SMT

Sun's first response to the IT dilemma of needing to do more with
fewer resources was to introduce the UltraSPARC T1 processor with
four cores and 32 threads. Next came the UltraSPARC T2 with eight
cores and 64 threads, to which Sun recently added symmetric
multiprocessing (SMT), enabling multiple CMT processors to be used
within a single system. The impact on energy costs and throughput has
been enormous, Chip Brookshaw reports, freeing the processor from the
limits formerly imposed by clock speed.

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