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Intel Atom Z520 compared to a 1 Eurocent coin. It is 182 mm2.
|Max. CPU clock rate||600 MHz to 2.13 GHz|
|FSB speeds||400 MHz to 667 MHz|
|Min. feature size||45 nm to 32 nm|
|Instruction set||MMX, SSE, SSE2, SSE3, SSSE3, IA-32, x86-64 (not for the N2xx and Z5xx series)|
Intel Atom is the brand name for a line of ultra-low-voltage IA-32 and Intel 64 (x86-64) CPUs (or microprocessors) from Intel, originally designed in 45 nm CMOS with subsequent models, codenamed Cedar, using a 32 nm process. Atom is mainly used in netbooks, nettops, embedded applications ranging from health care to advanced robotics, and mobile Internet devices (MIDs).
Atom processors are based on the Bonnell microarchitecture. On 21 December 2009, Intel announced the Pine Trail platform, including new Atom processor code-named Pineview (Atom N450), with total kit power consumption down 20%. On 28 December 2011, Intel updated the Atom line with the Cedar processors.
In December of 2012, Intel launched the 64-bit Centerton family of Atom CPUs, designed specifically for use in servers. Centerton adds features previously unavailable in Atom processors, such as Intel VT virtualization technology and support for ECC memory. Intel plans to launch a 22 nm successor to Centerton, codenamed Avoton, sometime in 2013.
Intel Atom is a direct successor of the Intel A100 and A110 low-power microprocessors (code-named Stealey), which were built on a 90 nm process, had 512 kB L2 cache and ran at 600 MHz/800 MHz with 3W TDP (Thermal Design Power). Prior to the Silverthorne announcement, outside sources had speculated that Atom would compete with AMD's Geode system-on-a-chip processors, used by the One Laptop per Child (OLPC) project, and other cost and power sensitive applications for x86 processors. However, Intel revealed on 15 October 2007 that it was developing another new mobile processor, codenamed Diamondville, for OLPC-type devices.
At Spring Intel Developer Forum (IDF) 2008 in Shanghai, Intel officially announced that Silverthorne and Diamondville are based on the same microarchitecture. Silverthorne would be called the Atom Z5xx series and Diamondville would be called the Atom N2xx series. The more expensive lower-power Silverthorne parts will be used in Intel mobile Internet devices (MIDs) whereas Diamondville will be used in low-cost desktop and notebooks. Several Mini-ITX motherboard samples have also been revealed. Intel and Lenovo also jointly announced an Atom powered MID called the IdeaPad U8.
In April 2008, a MID development kit was announced by Sophia Systems and the first board called CoreExpress-ECO was revealed by a German company LiPPERT Embedded Computers, GmbH. Intel offers Atom based motherboards.
|Intel Atom processor family|
|MID / Ultra-mobile PC / Lifestyle PC|
|Logo||Code-name||Series||Core||On-die GPU||GPU speed||TDP||HT||Intel 64||Intel VT-x||Release date
|Silverthorne||Atom Z5xx||single (45 nm)||No||200 MHz||0.65~2 W||No||No||No||April 2008|
|Lincroft||Atom Z6xx||single (45 nm)||Yes||400 MHz||1.3~3 W||Yes||No||No||May 2010|
|Classmate PC / Netbook / Nettop / Lifestyle PC|
|Logo||Code-name||Series||Core||On-die GPU||GPU speed||TDP||HT||Intel 64||Intel VT-x||Release date
|Diamondville||Atom N2xx||single (45 nm)||No||n/a||2.5 W||Yes||No||No||June 2008|
|Atom 2xx||4 W||Yes
|Atom 3xx||dual (45 nm)||8 W||September 2008|
|Pineview||Atom N4xx||single (45 nm)||Yes||200 MHz||6.5 W||Yes||Yes
|Atom D4xx||400 MHz||10 W|
|Atom N5xx||dual (45 nm)||200 MHz||8.5 W|
|Atom D5xx||400 MHz||13 W|
|Cedarview||Atom D2500||dual (32 nm)||Yes||400 MHz||10 W||No||Yes
|Atom D2700||640 MHz||Yes|
|Atom N2600||400 MHz||3.5 W||December 2011|
|Atom N2800||640 MHz||6.5 W|
|Logo||Code-name||Series||Core||On-die GPU||GPU speed||TDP||HT||Intel 64||Intel VT-x||Release date|
|Centerton||Atom S1220||dual (32 nm)||Unknown||1.60 GHz||8.1 W||Yes||Yes||Yes||December 2012|
|Atom S1240||1.60 GHz||6.1 W|
|Atom S1260||2.00 GHz||8.6 W|
|List of Intel Atom microprocessors|
Instruction set architecture 
32-bit and 64-bit hardware support 
All Atom processors implement the x86 (IA-32) instruction set; however, support for the Intel 64 instruction set was not added until the desktop Diamondville and desktop and mobile Pineview cores. The Atom N2xx and Z5xx series Atom models cannot run x86-64 code. The Centerton server processors will support the Intel 64 instruction set.
Intel 64 software support 
Intel states the Atom supports 64-bit operation only "with a processor, chipset, BIOS" that all support Intel 64. Those Atom systems not supporting all of these cannot enable Intel 64. As a result, the ability of an Atom-based system to run 64-bit versions of operating systems such as Ubuntu or Debian Linux may vary from one motherboard to another. Online retailer mini-itx.com has tested Atom-based motherboards made by Intel and Jetway, and while they were able to install 64-bit versions of Linux on Intel-branded motherboards with D2700 (Pineview) processors, Intel 64 support was not enabled on a Jetway-branded motherboard with a D2550 (Pineview) processor.
Even among Atom-based systems which have Intel 64 enabled, not all are able to run 64-bit versions of Microsoft Windows. For those Pineview processors which support 64-bit operation, Intel Download Center currently provides 64-bit Windows 7 and Windows Vista drivers for Intel GMA 3150 graphics, found in Pineview processors. However, no 64-bit Windows drivers are available for newer Atom Cedarview processors at this time.
The lack of 64-bit Windows support for Cedarview processors appears to be due to a driver issue. A member of the Intel Enthusiast Team has stated in a series of posts on enthusiast site Tom's Hardware that while the Atom D2700 (Pineview) was designed with Intel 64 support, due to a "limitation of the board" Intel had pulled their previously-available 64-bit drivers for Windows 7 and would not provide any further 64-bit support. Some system manufacturers have similarly stated that their motherboards with Atom Cedarview processors lack 64-bit support due to a "lack of Intel® 64-bit VGA driver support". Because all Cedarview processors use the same Intel GMA 3600 or 3650 graphics as the D2700, this indicates that Atom Cedarview systems will remain unable to run 64-bit versions of Windows, even those which have Intel 64 enabled and are able to run 64-bit versions of Linux.
Atom processors became available to system manufacturers in 2008. Because they are soldered, like northbridges and southbridges, onto a mainboard, Atom processors are not available to home users or system builders as separate processors, although they may be obtained preinstalled on some ITX motherboards. The Diamondville and Pineview Atom is used in the HP Mini Series, aigo MID Asus N10, Lenovo IdeaPad S10, Acer Aspire One & Packard Bell's "dot" (ZG5), recent ASUS Eee PC systems, Sony VAIO M-series, AMtek Elego, Dell Inspiron Mini Series, Gigabyte M912, LG X Series, Samsung NC10, Sylvania g Netbook Meso, Toshiba NB series (100, 200, 205, 255, 300, 500, 505), MSI Wind PC netbooks, RedFox Wizbook 1020i, Sony Vaio X Series, Zenith Z-Book, a range of Aleutia desktops,and the Archos
The performance of a single core Atom is about half that of a Pentium M of the same clock rate. For example, the Atom N270 (1.60 GHz) found in many netbooks such as the Eee PC can deliver around 3300 MIPS and 2.1 GFLOPS in standard benchmarks, compared to 7400 MIPS and 3.9 GFLOPS for the similarly clocked (1.73 GHz) Pentium M 740.
The Pineview platform has proven to be only slightly faster than the previous Diamondville platform. This is because the Pineview platform uses the same Bonnell execution core as Diamondville and is connected to the memory controller via the FSB, hence memory latency and performance in CPU-intensive applications are minimally improved.
Bonnell microarchitecture 
Intel Atom processors are based on the Bonnell microarchitecture, which can execute up to two instructions per cycle. Like many other x86 microprocessors, it translates x86-instructions (CISC instructions) into simpler internal operations (sometimes referred to as micro-ops, i.e., effectively RISC style instructions) prior to execution. The majority of instructions produce one micro-op when translated, with around 4% of instructions used in typical programs producing multiple micro-ops. The number of instructions that produce more than one micro-op is significantly fewer than the P6 and NetBurst microarchitectures. In the Bonnell microarchitecture, internal micro-ops can contain both a memory load and a memory store in connection with an ALU operation, thus being more similar to the x86 level and more powerful than the micro-ops used in previous designs. This enables relatively good performance with only two integer ALUs, and without any instruction reordering, speculative execution, or register renaming. The Bonnell microarchitecture therefore represents a partial revival of the principles used in earlier Intel designs such as P5 and the i486, with the sole purpose of enhancing the performance per watt ratio. However, Hyper-Threading is implemented in an easy (i.e., low power) way to employ the whole pipeline efficiently by avoiding the typical single thread dependencies.
On 13 September 2011 Intel and Google held a joint announcement of a partnership to provide support in Google's Android operating system for Intel processors (beginning with the Atom). This would allow Intel to supply chips for the growing smartphone and tablet market.
Embedded processors based on the ARM version 7 instruction set architecture (such as Nvidia's Tegra 3 series, TI's 4 series and Freescale's i.MX51 based on the Cortex-A8 core, or the Qualcomm Snapdragon and Marvell Armada 500/600 based on custom ARMv7 implementations) offer similar performance to the low end Atom chipsets[dubious ] but at roughly one quarter the power consumption, and (like most ARM systems) as a single integrated system on a chip, rather than a two chip solution like the current Atom line. Although the second-generation Atom codenamed "Pineview" should greatly increase its competitiveness in performance/watt, ARM plans to counter the threat with the multi-core capable Cortex-A9 core as used in Nvidia's Tegra 2/3, TI's OMAP 4 series, and Qualcomm's next-generation Snapdragon series, among others.
The Nano and Nano Dual-Core series from VIA is slightly above the average thermal envelope of the Atom, but offers hardware AES support, random number generators, and out-of-order execution. Performance comparisons of the Intel Atom against the Via Nano indicate that a single core Intel Atom is outperformed by the Via Nano which is in turn outperformed by a dual core Intel Atom 330 in tests where the second core is used. The Core 2 Duo SU7300 outperforms the dual-core Nano.
Kenton Williston of EE Times said that while Atom will not displace ARM from its current markets, the ability to apply the PC architecture into smaller, cheaper and lower power form factors will open up new markets for Intel.
See also 
- "Intel® Atom™ Processor Z520". Intel.
- Anand Lal Shimpi. "Intel's Atom N2600, N2800 & D2700: Cedar Trail, The Heart of the 2012 Netbook". Retrieved 28 December 2011.
- Jeff Moriarty (1 April 2008). "'Atom 101' - Deciphering the Intel codewords around MIDs". Retrieved 4 August 2010.
- Anand Lal Shimpi (27 January 2010). "Why Pine Trail Isn't Much Faster Than the First Atom". Retrieved 4 August 2010.
- "Intel Announces Next-Generation Atom Platform". Intel.
- "Products (Formerly Centerton)". Retrieved 22 March 2013.
- Ryan Smith (11 December 2012). "Intel Launches Centerton Atom S1200 Family, First Atom for Servers". Retrieved 22 March 2013.
- "Intel to unveil OLPC chips in Shanghai next April". InfoWorld. 15 October 2007.
- "Intel Announces Atom Brand for Silverthorne, Menlow". PC World.
- "Intel Developer Forum Spring 2008: Day 1 - Hardware Upgrade". Hwupgrade.it. 30 July 2005. Retrieved 4 April 2010.
- "Lenovo exhibits Atom based MID Ideapad U8 at IDF 2008 : Specs, reviews and prices".
- "MID dev kit sports Centrino Atom chipset". Retrieved 29 January 2011.
- "Tiny Centrino Atom-based module unveiled". Retrieved 29 January 2011.
- "Intel Desktop Board D945GCLF - Overview". Retrieved 29 January 2011.
- "Intel offers $80 "Little Falls" Atom mobo". Retrieved 29 January 2011.
- "Products: SPECIFICATIONS: Intel® Atom™ Processor".
- "Intel Atom Processor Specifications". Intel.com. Retrieved 4 April 2010.
- "Intel N2600 : Atom Benchmarked: 4W Of Performance". Intel.com. 28 August 2012. Retrieved 28 August 2012.
- "mini-itx.com - store - Intel Atom Mini-ITX boards". mini-itx.com. Retrieved 4 March 2013.
- "Download Center". Intel.com. Retrieved 04 March 2013.
- "Logic Supply Frequently Asked Questions". logicsupply.com. Retrieved 04 March 2013.
- "[Solved] Atom D2700 (Cedar Trail) 32 bit?". tomshardware.com. 10 February 2012. Retrieved 4 March 2013.
- "ASRock > AD2700B-ITX". asrock.com. Retrieved 4 March 2013.
- "HP Mini 210-2072cl PC Product Specifications".
- "SiSoft Sandra : Atom Benchmarked: 4W Of Performance". Tomshardware.com. 29 July 2008. Retrieved 4 April 2010.
- "Intel Pentium M 740 PCSTATS Review - Benchmarks: Office Productivity, SiSoft Sandra 2005". PCstats.com.
- "Why Pine Trail Isn't Much Faster Than the First Atom". AnandTech. Retrieved 4 April 2010.
- "Intel's Atom Architecture: The Journey Begins". AnandTech. Retrieved 4 April 2010.
- "TSMC To Build Intel's Atom-Based Chips". Forbes. 2 March 2009. Retrieved 3 March 2009.
- "Intel, Google announce partnership for Android smartphones". 14 September 2011.
- "Intel Atom vs. VIA Nano Platform Comparo Introduction". TweakTown. 11 August 2008. Retrieved 4 April 2010.
- "VIA Nano Dual Core Preview". 26 December 2010. Retrieved 26 December 2010.
- Kyle Bennett. "Introduction & Power - Intel Atom vs.VIA Nano". Hardocp.com. Retrieved 4 April 2010.
- "VIA Nano vs Intel Atom". TrustedReviews. Retrieved 4 April 2010.
- "VIA Nano Outperforms Intel Atom in Actual Industry Performance Benchmarking tests". Mydigitallife.info. 31 July 2008. Retrieved 4 April 2010.
- "Intel Atom Initial Benchmarking Data vs. Pentium and Celeron M Processors Before Official Release". Mydigitallife.info. 8 March 2008. Retrieved 4 April 2010.
- "EEE PC vs MSI Wind - Atom vs Celeron CPU Performance Benchmark: Netbooks, EEE PC, MSI Wind, Aspire One and Akoya Resources". Eeejournal.com. 11 May 2008. Retrieved 4 April 2010.
- "Intel Atom 230/330/VIA Nano performances contrasted". En.hardspell.com. 25 September 2008. Retrieved 4 April 2010.
- "Analysis: The real scoop on Atom-ARM rivalry". Retrieved 1 January 2012.
- "Intel cranks 45nm ultramobile CPU". EE Times. 18 April 2007. Retrieved 28 October 2007.
- "Intel reaches back in time for its ultralow power chips". 28 January 2008. Retrieved 29 January 2008.
- "New Intel Centrino Atom Processor Technology Ushers in 'Best Internet Experience in Your Pocket'". 2 April 2008.
- "Intel's Atom Architecture: The Journey Begins". 2 April 2008.
- "The Battle of Low-Power Processors: Best Choice for a Nettop". 27 September 2008.
- linuxdevices.com - Intel announces first Atom chips
- hardwaresecrets.com - Inside Atom Architecture
- computermonger.com - Intel Atom N280 vs N270 Benchmarked
- LinuxTECH.NET - Intel Pineview Atom based Motherboards Complete Overview
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