Dual-voltage CPU

A dual-voltage CPU uses a split-rail design to allow lower voltages to be used in the processor core while the external Input/Output (I/O) voltages remain 3.3 volts for backwards compatibility.

A single-voltage CPU uses a single power voltage throughout the chip, supplying both I/O power and internal power. As of 2002 Microprocessor#Market statistics, most CPUs are single-voltage CPUs. All^{[citation needed]} CPUs before the Pentium MMX are single-voltage CPUs.

Dual-voltage CPUs were introduced for performance gain when increasing clock speeds and finer semiconductor fabrication processes resulted in excess heat generation and power supply concerns, especially regarding laptop computers. Using a voltage regulator, the external I/O voltage levels would be transformed to lower voltages in order to reduce power usage, resulting in less heat being produced with the ability to operate at higher frequencies.

VRT is a feature on older Intel P5 Pentium processors that are typically intended for use in a mobile environment. It refers to splitting the core voltage supply from the I/O voltage. A VRT processor has a 3.3 V I/O and 2.9 V core voltage, to save power compared to a typical Pentium processor which had both I/O and core voltage at 3.3V. All Pentium MMX and later processors adopted this so-called split rail power supply.

External links

• An Illustrated Guide to Pentiums (Karbos Guide)
• Processor Voltage >> PC Mechanic

This computer hardware article is a stub. You can help Wikipedia by expanding it.v · Categories: Computer hardware stubs Central processing unit X86 architecture Wikimedia Foundation. 2010. Игры ⚽ Поможем решить контрольную работу Wintle's Wonders Kusatsu Station (Shiga) Look at other dictionaries: Dual-Voltage-CPU —   [dt. »Doppel Spannungs CPU«] (Split Voltage CPU), Prozessor (CPU), dessen Kern (Core) mit einer geringeren Betriebsspannung versorgt wird als der Ein /Ausgabe Bereich (I/O Bereich,I/O Spannung). Single Voltage CPUs verwenden für beide… …   Universal-Lexikon Single-Voltage-CPU —   [dt. »CPU mit einer einzigen Spannung«] die, Prozessor (= CPU), dessen Kern (Core) mit derselben Betriebsspannung versorgt wird wie der Ein /Ausgabebereich (I/O Bereich, I/O Spannung). Ggs.: Dual Voltage CPU …   Universal-Lexikon Pentium Dual-Core — This article is about Pentium Dual Core branded processors from 2006 to 2009. For current and other Pentium processors, see Pentium. Pentium Dual Core Produced From 2006 to 2009 Common manufacturer(s) …   Wikipedia Pentium Dual Core — Processeur Intel Pentium Dual Core E2160 Conroe Fabriqué 2007 Fabricant …   Wikipédia en Français Pentium dual-core — Processeur Intel Pentium Dual Core E2160 Conroe Fabriqué 2007 Fabricant …   Wikipédia en Français Comparison of CPU architectures — Contents 1 Factors 1.1 Bits 1.2 Operands 1.3 Endianess 2 Architectures …   Wikipedia Pentium Dual-Core — Pour les articles homonymes, voir Pentium. La gamme de microprocesseurs Pentium Dual Core est composée de microprocesseurs double cœur d entrée de gamme d Intel. Les premiers Pentium Dual Core ont été des Yonah, en 2006. Sommaire 1 Liste des… …   Wikipédia en Français Core-Spannung — Core Spannung,   die am Kern eines Prozessors anliegende elektrische Spannung. Bei einer Dual Voltage CPU unterscheidet sich diese Spannung von der I/O Spannung.   TIPP:   Bei Prozessoren sollten die Vorgaben des Herstellers für zulässige… …   Universal-Lexikon I/O-Spannung — I/O Spannung,   elektrische Spannung, mit der die Datenleitungen eines Prozessors versorgt werden, wenn es sich um eine Dual Voltage CPU handelt. Der Kern des Prozessors wird in diesem Fall mit einer Spannung versorgt, die geringer ist als die… …   Universal-Lexikon Central processing unit — CPU redirects here. For other uses, see CPU (disambiguation). An Intel 80486DX2 CPU from above An Intel 80486DX2 from below …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”