 Original logo | |
| General information | |
|---|---|
| Launched | September 23, 2003 |
| Discontinued | 2009 |
| Common manufacturer |
|
| Performance | |
| Max.CPUclock rate | 1.0 GHz to 3.2 GHz |
| HyperTransport speeds | 800 MT/s to 1000 MT/s |
| Architecture and classification | |
| Technology node | 130nm to 65nm |
| Microarchitecture | K8 |
| Instruction set | MMX,SSE,SSE2,SSE3,x86-64,3DNow! |
| Physical specifications | |
| Cores |
|
| Socket | |
| History | |
| Predecessor | Athlon |
| Successor | Athlon 64 X2 |
TheAthlon 64 is a ninth-generation,AMD64-architecturemicroprocessor produced byAdvanced Micro Devices (AMD), released on September 23, 2003.[1] It is the third processor to bear the nameAthlon, and the immediate successor to theAthlon XP.[2] The Athlon 64 was the second processor to implement the AMD64 architecture (after theOpteron) and the first64-bit processor targeted at the average consumer.[3] Variants of the Athlon 64 have been produced forSocket 754,Socket 939,Socket 940, andSocket AM2. It was AMD's primary consumer CPU, and primarily competed withIntel'sPentium 4, especially thePrescott andCedar Mill core revisions.
The Athlon 64 is AMD's firstK8, eighth-generation processor core for desktop and mobile computers.[4] Despite being natively 64-bit, the AMD64 architecture is backward-compatible with32-bitx86 instructions.[5] The Athlon 64 line was succeeded by the dual-coreAthlon 64 X2 andAthlon X2 lines.
The Athlon 64 was originally codenamedClawHammer by AMD,[3] and was referred to as such internally and in press releases. The first Athlon 64 FX was based on the firstOpteron core,SledgeHammer. Both cores, produced on a 130nanometer process, were first introduced on September 23, 2003. The models first available were the FX-51, fitting Socket 940, and the 3200+, fitting Socket 754.[6] Like the Opteron, on which it was based, the Athlon FX-51 required bufferedrandom-access memory (RAM), increasing the final cost of an upgrade.[7] The week of the Athlon 64's launch, Intel released thePentium 4 Extreme Edition, a CPU designed to compete with the Athlon 64 FX.[8] The Extreme Edition was widely considered a marketing ploy to draw publicity away from AMD, and was quickly nicknamed among some circles the "Emergency Edition".[9] Despite a very strong demand for the chip, AMD experienced early manufacturing difficulties that made it difficult to deliver Athlon 64s in quantity. In the early months of the Athlon 64 lifespan, AMD could only produce 100,000 chips per month.[10] However, it was very competitive in terms of performance to the Pentium 4, withPC World calling it the "fastest yet".[11] The Athlon FX-51 was also outperforming the Pentium 4 3.2C inQuake III Arena andUnreal Tournament 2003 benchmark, according toMaximum PC.[12] "Newcastle" was released soon after ClawHammer, with half the Level 2cache.[13]
All the 64-bit processors sold by AMD so far have their genesis in theK8 orHammer project. On June 1, 2004, AMD released new versions of both the ClawHammer and Newcastle core revisions for the newly introducedSocket 939, an alteredSocket 940 without the need for buffered memory.[14] Socket 939 offered two main improvements over Socket 754: thememory controller was altered withdual-channel architecture,[15] doubling peakmemory bandwidth, and theHyperTransport bus was increased in speed from 800 MHz to 1000 MHz.[16] Socket 939 also was introduced in the FX series in the form of the FX-55.[17] At the same time, AMD also began to ship the "Winchester" core, based on a 90 nanometer process.
Core revisions "Venice" and "San Diego" succeeded all prior revisions on April 15, 2005. Venice, the lower-end part, was produced for both Sockets 754 and 939, and included 512 kB of L2 cache.[18] San Diego, the higher-end chip, was produced only for Socket 939 and doubled Venice's L2 cache to 1 MB.[19] Both were produced on the 90 nm fabrication process.[20] Both also included support for theSSE3 instruction set,[21] a new feature that had been included in the rivalPentium 4 since the release of the Prescott core in February 2004.[22] In addition, AMD overhauled the memory controller for this revision, resulting in performance improvements as well as support for newerDDR SDRAM.[23]
On April 21, 2005, less than a week after the release of Venice and San Diego, AMD announced its next addition to the Athlon 64 line, theAthlon 64 X2.[24] Released on May 31, 2005,[25] it also initially had two different core revisions available to the public, Manchester and Toledo, the only appreciable difference between them being the amount of L2 cache.[26] Both were released only for Socket 939.[27] The Athlon 64 X2 was received very well by reviewers and the general public, with a general consensus emerging that AMD's implementation ofmulti-core was superior to that of the competingPentium D.[28][29] Some felt initially that the X2 would cause market confusion with regard to price points since the new processor was targeted at the same "enthusiast," US$350 and above market[30] already occupied by AMD's existing socket 939 Athlon 64s.[31] AMD's official breakdown of the chips placed the Athlon X2 aimed at a segment they called the "prosumer", along with digital media fans.[25] The Athlon 64 was targeted at the mainstream consumer, and the Athlon FX at gamers. TheSempron budget processor was targeted at value-conscious consumers.[32] Following the launch of the Athlon 64 X2, AMD surpassed Intel in US retail sales for a period of time, although Intel retained overall market leadership because of its exclusive relationships with direct sellers such as Dell.[33]
The Athlon 64 had been maligned by some critics for some time because of its lack of support forDDR2 SDRAM, an at the time emerging technology that had been adopted much earlier by Intel.[34] AMD's official position was that theCAS latency on DDR2 had not progressed to a point where it would be advantageous for the consumer to adopt it.[35] AMD finally remedied this gap with the "Orleans" core revision, the first Athlon 64 to fitSocket AM2, released on May 23, 2006.[36] "Windsor", an Athlon 64 X2 revision for Socket AM2, was released concurrently. Both Orleans and Windsor have either 512kB or 1MB of L2 cache per core.[37] The Athlon 64 FX-62 was also released concurrently on the Socket AM2 platform.[38] Socket AM2 also uses less power than prior platforms, and supportsAMD-V.[39]
The memory controller used in all DDR2 SDRAM capable processors (Socket AM2), has extended column address range of 11 columns instead of conventional 10 columns, and the support of 16 kB page size, with at most 2048 individual entries supported. AnOCZ unbuffered DDR2 kit, optimized for64-bitoperating systems, was released to exploit the functionality provided by the memory controller in socket AM2 processors, allowing the memory controller to stay longer on the same page, thus benefitting graphics intensive applications.[40]
The Athlon architecture was further extended with the release ofAthlon Neo processors on January 9, 2009. Based on the same architecture as the other Athlon 64 variants, the new processor features a small package footprint targetingUltra-portable notebook market.
| AMD Athlon 64 processor family | |||||||
|---|---|---|---|---|---|---|---|
| Logo | Desktop | Logo | Laptop | ||||
| Code-named | Core | Date released | Code-named | Core | Date released | ||
| ClawHammer Newcastle Winchester Venice Manchester* San Diego Toledo* | 130 nm 130 nm 90 nm 90 nm 90 nm 90 nm 90 nm | Dec 2003 Dec 2003 Oct 2004 April 2005 May 2005 May 2005 May 2005 |  | ClawHammer Odessa Oakville Newark | 130 nm 130 nm 90 nm 90 nm | Dec 2003 Feb 2004 Aug 2004 Apr 2005 |
 | SledgeHammer ClawHammer San Diego | 130 nm 130 nm 90 nm | Sep 2003 Jun 2004 Jun 2005 | ||||
 | Orleans Lima | 90 nm 65 nm | May 2006 Feb 2007 |  | Huron | 65 nm | Jan 2009 |
| *Athlon X2 with one core disabled List of AMD Athlon 64 processors | |||||||
There are four variants:Athlon 64,Athlon 64 FX,Mobile Athlon 64 (later renamed "Turion 64") and the dual-coreAthlon 64 X2.[41] Common among the Athlon 64 line are a variety of instruction sets includingMMX,3DNow!,SSE,SSE2, andSSE3.[42] All Athlon 64s also support theNX bit, a security feature named "Enhanced Virus Protection" by AMD.[43] And as implementations of theAMD64 architecture, all Athlon 64 variants are able to run16 bit, 32 bitx86, and AMD64code, through two different modes the processor can run in: "Legacy mode" and "long mode". Legacy mode runs 16-bit and 32-bit programs natively, and long mode runs 64-bit programs natively, but also allows for 32-bit programs running inside a 64-bitoperating system.[44] All Athlon 64 processors feature 128 Kilobytes of level 1 cache, and at least 512 kB of level 2 cache.[42]
The Athlon 64 features an on-die memory controller,[5] a feature formerly seen on only theTransmeta Crusoe. This means the controller runs at the sameclock rate as the CPU, and that the electrical signals have a shorter physical distance to travel compared to the oldnorthbridge interfaces.[45] The result is a significant reduction in latency (response time) for access requests to main memory.[46] The lower latency was often cited as one of the advantages of the Athlon 64's architecture over those of its competitors at the time.[47]
As the memory controller is integrated onto the CPU die, there is no FSB for the system memory to base its speed upon.[48] Instead, system memory speed is obtained by using the following formula (using theceiling function):[49]
In simpler terms, the memory is always running at a set fraction of the CPU speed, with the divisor being a whole number. An 'FSB' figure is still used to determine the CPU speed, but the RAM speed is no longer directly related to this 'FSB' figure (known otherwise as the LDT).
A second bus, the northbridge, connected the CPU to the chipset and device attachment bus (PCIe, AGP, PCI). This was implemented using a new high-performance standard,HyperTransport. AMD attempted, with some success, to make this an industry standard. It was also useful in building multi-processor systems without additional glue chips.
Translation lookaside buffers (TLBs) have also been enlarged (40 4k/2M/4M entries in L1 cache, 512 4k entries),[50] with reduced latencies and improvedbranch prediction, with four times the number of bimodal counters in the global history counter.[44] This and other architectural enhancements, especially as regards SSE implementation, improveinstructions per cycle (|IPC) performance over the prior Athlon XP generation.[44] To make this easier for consumers to understand, AMD has chosen to market the Athlon 64 using aPR (Performance Rating) system, where the numbers roughly map to Pentium 4 performance equivalents, rather than actual clock speed.[51]
Athlon 64 also featuresCPU speed throttling technology brandedCool'n'Quiet, a feature similar to Intel'sSpeedStep that can throttle the processor's clock speed back to facilitate lower power use and heat output.[52] When the user is running undemanding applications and the load on the processor is light, the processor clock speed and voltage are reduced. This in turn reduces its peak power use (maxthermal design power (TDP) set at 89 W by AMD) to as low as 32 W (stepping level C0, clock speed reduced to 800 MHz) or 22W (stepping CG, clock speed reduced to 1 GHz). The Athlon 64 also has anintegratedheat spreader (IHS) which prevents the CPU die from being damaged accidentally when mounting and unmounting heat sinks. With prior AMD CPUs, aCPU shim could be used by people worried about damaging the die.
TheNo Execute bit (NX bit) supported byWindows XP Service Pack 2 and future versions of Windows,Linux 2.6.8 and higher andFreeBSD 5.3 and higher is also included, for improved protection from maliciousbuffer overflow security threats. Hardware-set permission levels make it much more difficult for malicious code to take control of the system. It is intended to make64-bit computing a more secure environment.
The Athlon 64 CPUs have been produced with 130 and 90 nmsilicon on insulator (SOI) process technologies.[53] All of the latest chips (Winchester, Venice, and San Diego models) are on 90 nm. The Venice and San Diego models also incorporate dual stress liner technology[54] (an amalgam ofstrained silicon and 'squeezed silicon', the latter of which is not actually a technology) co-developed with IBM.[55]
The Athlon 64 FX is positioned as a hardware enthusiast product, marketed by AMD especially towardgamers.[56] Unlike the standard Athlon 64, all of the Athlon 64 FX processors have their multipliers completely unlocked.[57] Starting with the FX-60, the FX line became dual-core.[58] The FX always has the highest clock speed of all Athlons at its release.[59] From FX-70 onwards, the line of processors will also support dual-processor setup withNUMA, namedAMD Quad FX platform.
The Athlon 64 X2 is the firstdual-coredesktop CPU manufactured byAMD.In 2007, AMD released two final Athlon 64 X2 versions: the AMD Athlon 64 X2 6400+ and 5000+ Black Editions. Both processors feature an unlocked multiplier, which allows for a large range of overclocked settings. The 6400+ is based on a 90 nm Windsor core (3.2 GHz, 2x1 MB L2, 125 W TDP) while the 5000+ is based on a 65 nm Brisbane core (2.6 GHz, 2 x 512 kB L2, 65 W TDP). These Black Edition processors are available at retail, but AMD does not include heatsinks in the retail package.
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Formerly introduced asMobile Athlon 64,Turion 64 is now the brand nameAMD applies to its 64-bit low-power use (mobile) processors. TheTurion 64 andTurion 64 X2 processors compete withIntel's mobile processors, initially thePentium M and later theIntel Core andIntel Core 2 processors.
Earlier Turion 64 processors are compatible with AMD'sSocket 754. The newer "Richmond" models are designed for AMD'sSocket S1. They are equipped with 512 or 1024 kB of L2 cache, a 64-bit single channel on-die memory controller, and an 800 MHzHyperTransport bus. Battery saving features, likePowerNow!, are central to the marketing and usefulness of these CPUs.
The model naming scheme does not make it obvious how to compare one Turion with another, or even an Athlon 64. The model name is two letters, a dash, and a two digit number (for example, ML-34). The two letters together designate a processor class, while the number represents aPR rating. The first letter is M for single core processors and T for dual coreTurion 64 X2 processors. The later in the alphabet that the second letter appears, the more the model has been designed for mobility (low power use). Take for example, an MT-30 and an ML-34. Since the T in the MT-30 is later in the alphabet than the L in ML-34, the MT-30 uses less power than the ML-34. But since 34 is greater than 30, the ML-34 is faster than the MT-30.
With 27 mm × 27 mm in size and 2.5 mm in thickness, the Athlon Neo processors utilize a new package called "ASB1", essentially aBGA package, for smaller footprint to allow smaller designs for notebooks and lowering the cost. The clock of the processors is significantly lower than desktop and other mobile counterparts to reach a low TDP, at 15W maximum for a single core x86-64 CPU at 1.6 GHz. The Athlon Neo processors are equipped with 512 kB of L2 cache and HyperTransport 1.0 running at 800 MHz frequency.
At the introduction of Athlon 64 in September 2003, only Socket 754 and Socket 940 (Opteron) were ready and available. The onboard memory controller was not capable of running unbuffered (non-registered) memory in dual-channel mode at the time of release; as a stopgap measure, they introduced the Athlon 64 on Socket 754, and brought out a non-multiprocessor version of the Opteron called the Athlon 64 FX, as a multiplier unlocked enthusiast part for Socket 940, comparable to Intel's Pentium 4 Extreme Edition for the high end market.
In June 2004, AMD released Socket 939 as the mainstream Athlon 64 with dual-channel memory interface, leaving Socket 940 solely for the server market (Opterons), and relegating Socket 754 as a value/budget line, for Semprons and slower versions of the Athlon 64. Eventually Socket 754 replacedSocket A for Semprons.
In May 2006, AMD released Socket AM2, which provided support for the DDR2 memory interface. Also, this marked the release ofAMD-V.
In August 2006, AMD released Socket F forOpteron server CPU which uses theLGA chip form factor.
In November 2006, AMD released a specialized version of Socket F, called 1207 FX, for dual-socket, dual-core Athlon FX processors on the Quad FX platform. While Socket F Opterons already allowed for four processor cores, Quad FX allowed unbuffered RAM and expanded CPU/chipset configuration in the BIOS. Consequentially, Socket F and F 1207 FX are incompatible and require different processors, chipsets, and motherboards.
Dual-core CPU
Dual-core CPU
Dual-core, dual CPUs (four cores total)
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Also possible: ClawHammer-512 (Clawhammer with partially disabled L2 cache)
The Athlon 64 was succeeded by theK10 architecture in 2007, including but not limited to thePhenom andPhenom II processors. These successors feature higher core counts per CPU, and implement Hypertransport 3.0 and Socket AM2+/AM3.
As of February 2012, Athlon 64 X2 processors were still available for sale.[61]