- UltraSPARC IV
The UltraSPARC IV and follow-up UltraSPARC IV+ are
microprocessor s designed bySun Microsystems and manufacturered byTexas Instruments . They are the fourth and fifth generation of theUltraSPARC microprocessor family, implementing the 64-bit SPARC V9 instruction architecure.The UltraSPARC IV was the first multi-core SPARC processor, and was designed to be compatible with the previous
UltraSPARC III processor line: internally, it implements two UltraSPARC III cores, and its physical packaging is identical to the UltraSPARC III with the exception of one pin. [cite web
url = http://www.sun.com/processors/whitepapers/us4_whitepaper.pdf
title = UltraSPARC IV Processor Architecture Overview
accessdate = 2007-12-05
month = February | year = 2004
publisher = Sun Microsystems
format=PDF] The UltraSPARC IV contains 66 milliontransistor s. Servers using the UltraSPARC IV were released in September 2004. The UltraSPARC IV+ is also a dual-core design, featuring enhanced processor cores and an on-chip L2 cache. It is fabricated on a 90nanometer manufacturing process. The initial speed of the UltraSPARC IV+ was 1.5 GHz, later increased to 2.1 GHz. It contains 295 million transistors. [cite web
url = http://www.sun.com/processors/UltraSPARC-IVplus/
title = UltraSPARC IV+
accessdate = 2007-12-05
work = Sun Web site
publisher = Sun Microsystems] The UltraSPARC IV+ was released in Sun servers in September 2005.Sun Fire V490, V890, E2900, E4900, E6900, E20K and E25K systems all use UltraSPARC IV and IV+ processors. These systems range from four processor sockets to 72 processor sockets.Servers powered by the UltraSPARC IV+ processor were well received, allowing Sun to regain revenue lead in the
Unix server market in2006 . [cite web
url = http://www.sun.com/smi/Press/sunflash/2006-05/sunflash.20060524.2.xml
title = Analyst Firm Shows Sun Gaining Market Share in Worldwide Server Market
accessdate = 2007-12-05
date = May 24, 2006
publisher = Sun Microsystems]References
External links
* [http://www.computerworld.com/hardwaretopics/hardware/story/0,10801,96460,00.html Computerworld article]
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