AMD Athlon II X2 microprocessor family

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Athlon X2 (K10)
  • » K10 microarchitecture
  • » 0.045 and 0.065 micron
  • » Budget desktop CPU
  • » Dual core
  • » Up to 2.8 GHz
  • » 1 MB L2 cache
  • » Up to 2 MB L3 cache
  • » 64-bit
  • » SSE2, SSE3, SSE4a
  • » Virtualization
Socket AM2
Socket AM2+
Socket AM3
Athlon II X2
  • » K10 microarchitecture
  • » 0.032 and 0.045 micron
  • » Budget desktop CPU
  • » Dual core
  • » Up to 3.6 GHz
  • » Up to 2 MB L2 cache
  • » No L3 cache
  • » 64-bit
  • » SSE3, SSE4a
  • » Virtualization
Socket AM2+
Socket AM3
Socket FM1
  • » Single core
Athlon II
  • » Single core
Athlon II X3
  • » Triple core
Athlon II X4
  • » Quad core
Phenom II X2
  • » Desktop CPU
  • » Up to 6 MB L3 cache
A4-Series (K10)
  • » K10 microarchitecture
  • » 0.032 micron
  • » Budget desktop CPU
  • » Dual core
  • » Up to 2.8 GHz
  • » 1 MB L2 cache
  • » No L3 cache
  • » 64-bit
  • » Integrated GPU
  • » SSE3, SSE4a
  • » Virtualization
Socket FM1
Athlon X2 (Bulldozer)
  • Same as A4-Series, except:
  • » Piledriver microarchitecture
  • » Up to 4 GHz
  • » AES, AVX, FMA instructions
  • » Turbo Core
Socket FM2
Athlon II X2 is the next generation of dual-core budget microprocessors, that superseded Athlon X2 family. The Athlon II X2 family was introduced in June 2009, four months before the launch of X3 triple-core and X4 quad-core Athlon II families. While many features of Athlon II X2 family and X3/X4 families are alike, there are two important differences between them. First, the X2 microprocessors have only two physical cores on a die. Almost all other Athlon II and Phenom II families pack 4 cores on a die, and, depending on a family, have from two to four cores enabled. With only two cores on a die, and without integrated L3 cache, AMD was able to significantly reduce the size of Athlon II X2 die - it's 30% smaller than the die size of triple- and quad-core Athlon II processors, and 50% smaller than the size of Phenom II processors. The other noteworthy difference between the dual-core Athlons and other Athlon II / Phenom II CPUs is the larger size of level 2 cache on Athlon II X2 microprocessors - 1 MB per core. Level 1 cache on X2s is 128 KB per core, which is identical to other K10 processors. Athlon II X2 microprocessors don't have level 3 cache.

Athlon II X2 CPUs integrate memory controller that works with DDR3 and DDR2 memory. DDR3 memory is supported only when the processors are used in socket AM3 motherboards. Despite the fact that the package of all Athlon II X2s has 938 pins, or two less pins than the package of socket AM2+ processors, Athlon II CPUs do fit into socket AM2+ motherboards, and, with proper BIOS support, will work in them. Like the Athlon X2 family, Athlon IIs also integrate one HyperTransport link, although it's clocked higher, at 2 GHz.

All members of Athlon II X2 family include the following features:

  • SIMD (Single Instruction Multiple Data) extensions to instruction set - AMD's 3DNow! and Intel's extensions from MMX and up to SSE3. The processors also support 4 additional instructions that AMD dubbed "SSE4a".
  • 64-bit instructions allow microprocessors to run 64-bit operating system.
  • Enhanced Virus Protection, or NX bit prevents execution of malicious code in data memory by flagging that memory as "non-executable".
  • Virtualization provides hardware support for, and acceleration of virtualization software, i.e special software that creates and runs virtual computer environments.

Athlon IIs have a number of power-saving technologies, marketed as PowerNow! 3.0:

  • Cool'n'Quiet automatically reduces processor frequency and core voltage when idling, thus reducing dissipated power.
  • CoolCore technology turns off parts of the processor to reduce power consumption.
  • Smart Fetch Technology reduces unnecessary core wake-ups by sharing core data with other package cores before the core is stopped.
  • Dual Dynamic Power Management can manipulate voltage of processor core or memory controller independently from each other.

The Athlon II X2 family consists from microprocessors fitting three different thermal envelopes:

  • Standard power - 65 Watt TDP.
  • Low power - 45 Watt TDP. These processors have model numbers ending with lowercase "e", for example, "240e".
  • Ultra-low power - 25 Watt TDP. Model numbers of these CPUS end with "u", and there model numbers are not comparable to model numbers of standard-power and low-power Athlons.

Model numbers of Athlon II X2 microprocessors consist from three digits with the first digit always "2", and an optional letter that signifies processor power - "e" for low-power, and "u" for ultra-low power processors.

For averaged performance of Athlon II X2 processors please see AMD Athlon II X2 multi-threading and single-threading performance pages.

Use the filter below to display microprocessors that have specific feature(s) incorporated:

Production microprocessors

AMD Athlon II X2 250u - AD250USCK23GQ
Author: gshv
Athlon II X2 250u is one of the first K10-based ultra low power microprocessors, released in the forth quarter of 2009. Feature-wise the 250u is nearly undistinguishable from other Athlon II X2 CPUs - it has per-core 128 KB level 1 and 1 MB level 2 caches, 64-bit instructions, Enhanced Virus protection (disable bit) feature, support for SIMD instructions up to SSE4A, and works with DDR2 and DDR3 memory. The model 250u has much lower power dissipation than other Athlon II CPUs, even energy efficient ones. Performance-wise this CPU is slower than standard and middle-power Athlon II due to lower operating frequency. Currently (January 2010) this processor is being offered only in OEM systems, such as HP Pavilion All-in-One MS225 desktop PC, or Lenovo C305.
AMD Athlon II X2 215 - ADX215OCK22GQ
Author: gshv
At this time (October 2009) the ADX215OCK22GQ is the slowest microprocessor from Athlon II X2 family. Nevertheless, The Athlon II X2 215 has better performance in memory intensive applications, and MMX/SSEx-enabled applications than the fastest dual-core processor based on K8 microarchitecture - Athlon 64 X2 6400+. Integer and floating-point performance of the 215 is slightly slower than the fastest Athlon 64 X2 CPUs (6400+, 6000+). The closest match from Athlon X2 family for the 215 is 7750 or 7750 Black edition. Both processors, Athlon II X2 215 and Athlon X2 7750, run at 2.7 GHz frequency, and have the same size of level 1 and level 2 caches. Although the 215 has enhanced core and support for DDR3 memory, it lacks level 3 cache that is present in 7750 microprocessor.
Model 240e, with OEM part number AD240EHDK23GQ and box part number AD240EHDGQBOX, is a low power version of Athlon II X4 240 CPU. This processor was released in October 2009 together with a group of other energy-efficient Athlon II microprocessors. Built on the same Rana core as other members of Athlon II X2 family, the 240e runs at 2.8 GHz and features 1 MB level 2 cache per core. With Thermal Design Power (TDP) just 45 Watt, this processor is a perfect fit for low-power systems, like HTPC or always-on office computers. As a comparison, the best dual-core AMD desktop CPU with 45 Watt TDP, based on older K8 microarchitecture, was Athlon 64 X2 5050e. The 5050e runs at 2.6 GHz and has twice smaller L2 cache. As a consequence, model 240e has 15% - 50% better performance than the 5050e.
X2 is the only Athlon II family that contains several business class microprocessors. Business class Athlon CPUs use different model numbering convention, always prefixed with "B", and followed by two-digit 2X number. Phenom Business-class processors used 5x, 7x and 9x numbers. Certain characteristics of B2x models, such as up to 24-month longevity and support, were appealing to OEM builders. From end-user point of view, B2X models don't have anything extra over non-business class Athlons. As an example, this B22 part has exactly the same features and performance as Athlon II 240.
ADX245OCK23GM was one of the first dual-core microprocessors with newer C3 core stepping. This stepping came with a few notable features, such as new C1E low-power state, implemented in hardware, and generally lower power consumption and cooler operation. The C3 stepping also fixed errata in C2 core revision, where the CPU could not reliably access DDR3-memory when each memory channel had more than one memory module populated. C3 core can be identified by "GM" suffix in the part number. Performance-wise the ADX245OCK23GM is similar to "GQ" model.
AMD Athlon II X2 250 - ADX250OCK23GQ / ADX250OCGQBOX
Author: gshv
The ADX250OCK23GQ / ADX250OCGQBOX, the first microprocessor from Athlon II X2 family, was introduced simultaneously with socket AM3 Phenom II X2, X3 and X4 CPUs. The 250 is clocked at 3 GHz, same as Phenom II 545. Even though the ADX250OCK23GQ has twice larger level 2 cache than the 545, it doesn't have level 3 cache, which results in slightly lower, up to 5%, performance of the 250. Performance of the Athlon II X2 250 is even lower, often by 10% or more, in memory intensive applications, including games. Comparing the 250 with Intel microprocessors is difficult due to big differences in microarchitectures and CPU core efficiency. Depending on application, the 250 can be as slow as Pentium Dual-Core E5200, while in other applications it may be on a par with or faster than Pentium Dual-Core E6300.
The 280 is the latest, and possibly the last, Athlon II model released by AMD. Launched more 1.5 years after previous X2 265 model, the 280 has the highest clock speed from all Athlon II X2 CPUs, with the exception of B30. Despite of this, it has the same 65 Watt power rating as other Athlon IIs. The CPU has C3 stepping, therefore upgrading to it shouldn't present problems to current owners of socket AM3 motherboards. The X2 280 is offered as a low budget chip, with the official price lower than $50.

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At a glance

64-bit microprocessor
Jun 2, 2009
Technology (micron):
0.032, 0.045
The number of cores:
Frequency (GHz):
1.6 - 3.6
L2 cache size (MB):
1, 2