According to the ISSCC 2010 presentation: "A 16-core SPARC SoC processor enables up to 512 threads in a 4-way glueless system to maximize throughput. The 6MB L2 cache of 461GB/s and the 308-pin SerDes I/O of 2.4Tb/s support the required bandwidth. Six clock and four voltage domains, as well as power management and circuit techniques, optimize performance, power, variability and yield trade-offs across the 377mm2 die." SPARC T4 The T4 CPU was released in late 2011. The new T4 CPU will drop from 16 cores (on the T3) back to 8 cores (as used on the T1, T2, and T2+). The new T4 core design (named "S3") feature improved per-thread performance, due to introduction of out-of-order execution, as well as having additional improved performance for single-threaded programs. In 2010, Larry Ellison announced that Oracle will offer Oracle Linux on the UltraSPARC platform, and the port was scheduled to be available in the T4 and T5 timeframe. John Fowler, Executive Vice President Systems Oracle, in Openworld 2014 said Linux will be able to run on Sparc at some point. SPARC T5 The new T5 CPU features 128 threads over 16 cores and is manufactured with a 28 nanometer technology. Open design On March 21, 2006, Sun made the UltraSPARC T1 processor design available under the GNU General Public License via the OpenSPARC project. The published information includes: Verilog source code of the UltraSPARC T1 design; Verification suite and simulation models; ISA specification (UltraSPARC Architecture 2005); The Solaris 10 OS simulation images. References External links OpenSPARC T1 and Specifications OpenSPARC Overview Sun's Big Splash by Linda Geppert, in IEEE Spectrum, January 2005 Niagara, a 32-way Multithreaded SPARC Processor by Poonacha Kongetira, Kathirgamar Aingaran, Kunle Olukotun, in IEEE Micro, March–April 2005 Sun microprocessors Open microprocessors SPARC microprocessors 64-bit microprocessors