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AMD A6-Series A6-6400K - AD640KOKA23HL / AD640KOKHLBOX

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AMD A6-6400K specifications

General information
TypeCPU / Microprocessor
Market segmentDesktop
FamilyAMD A6-Series
Model number  ? A6-6400K
CPU part numbers
  • AD640KOKA23HL is an OEM/tray microprocessor
  • AD640KOKHLBOX is a boxed microprocessor
Frequency  ? 3900 MHz
Turbo frequency4100 MHz
Boosted P states [1]#1: 4100 MHz, 1.275V
#2: 4000 MHz, 1.15V
Package904-pin organic lidded micro Pin Grid Array (UOF904)
SocketSocket FM2
Size1.57" x 1.57" / 4cm x 4cm
Introduction dateJune 4, 2013
Price at introduction$71
Architecture / Microarchitecture
Processor core  ? Richland
Core stepping  ? RL-A1
Manufacturing process0.032 micron
Data width64 bit
The number of cores2
The number of threads2
Floating Point UnitIntegrated
Level 1 cache size  ? 64 KB shared instruction caches
2 x 16 KB data caches
Level 2 cache size  ? 1 MB shared cache
Level 3 cache sizeNone
  • MMX instructions
  • SSE / Streaming SIMD Extensions
  • SSE2 / Streaming SIMD Extensions 2
  • SSE3 / Streaming SIMD Extensions 3
  • SSSE3 / Supplemental Streaming SIMD Extensions 3
  • SSE4 / SSE4.1 + SSE4.2 / Streaming SIMD Extensions 4  ? 
  • SSE4a  ? 
  • AES / Advanced Encryption Standard instructions
  • ABM / Advanced Bit Manipulation  ? 
  • AVX / Advanced Vector Extensions
  • BMI1 / Bit Manipulation instructions 1
  • F16C / 16-bit Floating-Point conversion instructions
  • FMA3 / 3-operand Fused Multiply-Add instructions
  • FMA4 / 4-operand Fused Multiply-Add instructions
  • TBM / Trailing Bit Manipulation instructions
  • XOP / eXtended Operations instructions
  • AMD64 / AMD 64-bit technology  ? 
  • VT / Virtualization technology  ? 
  • EVP / Enhanced Virus Protection  ? 
  • Turbo Core 3.0 technology
Low power featuresPowerNow!
Low power P states [1]#1: 3600 MHz, 0.925V
#2: 3100 MHz, 0.775V
#3: 2600 MHz, 0.65V
#4: 2200 MHz, 0.45V
#5: 1800 MHz, 0.25V
Integrated peripherals / components
Integrated graphics
  • GPU Type: Radeon HD 8470D
    Shader cores: 192
    Base frequency (MHz): 800
Memory controller
  • The number of controllers: 1
    Memory channels: 2
    Supported memory: DDR3-1866
    Maximum memory bandwidth (GB/s): 29.9
Other peripherals
  • PCI Express 2.0
  • Unified Video Decoder 3.2
Electrical / Thermal parameters
Maximum operating temperature  ? 70°C
Thermal Design Power  ? 65 Watt
Notes on AMD A6-6400K
  • The processor has unlocked clock multiplier

[1] - These characteristics were measured on a single CPU, and they can vary slightly for other processors with the same model number

Detailed side-by-side comparison

For detailed comparision of the AMD A6-6400K and any other other chip from our CPU database type in a chip name and/or its partial specs:

You can specify any of the following: manufacturer name, family name, model number, part number, core name, socket name, operating frequency, bus speed, and the last level cache. Here are examples of searches: A6-6400K, AD640KOKA23HL, AMD A6-Series 3.9GHz, Richland Socket FM2

Historical price chart

The chart below shows official prices of AMD A6-Series A6-5400K, A6-Series A6-6400K and A8-Series A8-6500T processors:

Historical official prices of A6-Series A6-5400K, A6-Series A6-6400K and A8-Series A8-6500T processors


Q: I have an AMD A6-6400K microprocessor. Can I upgrade it?
A: Probably yes. Processor compatibility is determined by your motherboard. Please see resource for CPU support list for your board.

A6-6400K Overclocking

Sorry, overclocking information is not available at this time.

Related news stories

AMD cuts prices of A6 and A8 APUs; reveals price of A10-6790K
Nov 07, 2013: Last week AMD announced A10-6790K APU, which was positioned as a slightly slower, but also less expensive version of the flagship A10-6800K chip. Today the 6790K was added to AMD's official price list. Furthermore, the company added prices of FX-9370 and FX-9590 microprocessors for AM3+ platform. Finally, AMD reduced prices of A6-6400K, A8-6500 and A8-6600K models by 12% - 13%. The A6-6400K now costs $62, and the price of A8 SKUs was slashed from $112 to $97.

AMD announces third generation desktop APUs
Jun 05, 2013: AMD today announced desktop Accelerated Processing Units, based on recently launched "Richland" core. New processors are A10-6800K, A10-6700, A8-6600K, A8-6500, and A6-6400K, boasting 2 or 4 "Piledriver" CPU cores, and HD 8000 series graphics. The latter is a new feature of "Richland" products, that improves graphics performance by as much as 20%. Another new feature is support for DDR3-2133 memory, although it is available only on the A10-6800K model.

AMD adds prices for "Richland" APUs
Jun 01, 2013: AMD added prices of forthcoming "Richland" processors to company's official pricelist. As you may know, "Richland" Accelerated Processing Units combine 2 or 4 Piledriver CPU cores with HD 8000 series graphics in a single package. AMD plans to release several different quad-core "Richland" parts, branded as A8- and A10-Series, along with A4- and A6-Series dual-core APUs. The fastest chips in the series are A10-6700 with 65 Watt TDP, and A10-6800K with unlocked clock multiplier and 100 Watt TDP.

Prices of upcoming AMD A-Series APUs
May 29, 2013: AMD A-series APUs with "Richland" core were previously reported to launch in June, presumably during Computex show in Taiwan. In advance of this event the company published "AMD Elite Series APUs" product summary on their website, that details upcoming lineup, performance in Basemark CL and 3DMark benchmarks, and pricing. The document also states that the microprocessors will be launched on June 4, 2013.

AMD "Richland" APUs spotted in Lenovo desktop PC
Apr 26, 2013: As we're getting closer to the launch of desktop "Richland" APUs, they started to appear in OEM desktop PCs from major manufacturers. Lenovo recently added new product pages for H535 and H535s computers to their UK website. Both computers list current generation of "Trinity" processors, along with upcoming "Richland" APUs.

AMD Richland processors to launch in March
Mar 05, 2013: AMD currently ships second-generation desktop and mobile APUs with "Trinity" core, that combines "Piledriver" microarchitecture and Radeon HD 7000 series graphics. Next generation of accelerated units will utilize Richland core with integrated graphics, upgraded to HD 8000. Richland processors were planned to launch in the first half of this year, although their announcement may come as early as the next week.

Specifications of upcoming AMD Richland APUs
Jan 26, 2013: Quite a few new details on upcoming AMD "Richland" Accelerated Processing Units have surfaced this week. First, Fudzilla posted partial specifications of A4-6300 and A6-6400K dual-core parts. It was followed by a rumor on additional A8- and A10-Series Richland APUs, that revealed their TDP and the type of integrated graphics. Finally, VR-Zone Chinese published complete Richland lineup specifications, including CPU and GPU clock speeds.

AMD prepares A4-6300 and A6-6400K dual-core APUs
Jan 23, 2013: In the next quarter, AMD plans to replace "Trinity" Accelerated Processing Units with products, based on "Richland" core. The new core combines Piledriver microarchitecture with HD 8000-series graphics, and it is expected to be compatible with existing socket FM2 motherboards. So far we only knew about a successor to A10-5800K APU, that will be dubbed as A10-6800K. Two other Richland chips, A4-6300 and A6-6400K, were revealed by Fudzilla this week.

Compare AMD A6-6400K benchmark results with all tested CPUs from one of the following families:

To compare this A6-Series CPU with any tested processor please proceed to

For additional benchmarks, comparing multi-threaded performance of this microprocessor with other A6-Series CPUs and the fastest AMD and Intel x86 chips, please visit AMD A6-6400K benchmarks page.

AMD A6-6400K Benchmarks

The graphs below show up to 10 microprocessors with approximately the same level of integer (CPU), floating-point (FPU), SIMD and memory performance. All processors were not overclocked, and were tested at a nominal frequency, with a stock heatsink and default BIOS settings. Click on the '?' mark next to each model name to see specifications of that model, and details of the test platform. To find out how the A6-6400K compares to other CPUs in specific benchmarks or in aggregate milti-threading performance please see benchmark tools section on the right.

Benchmarked processor

CPU ID:610F31
CPU vendor string:AuthenticAMD
CPU name string:AMD A6-6400K APU with Radeon(tm) HD Graphics

Integer performance

Part number   Result
AMD Phenom II X3 700e  ? 
AMD Athlon X4 730  ? 
Intel Core 2 Extreme X6800  ? 
AMD Athlon II X3 405e (rev. C2)  ? 
AMD Athlon II X3 405e (rev. C3)  ? 
AMD A6-3500  ? 
AMD Athlon II X3 400e  ? 
AMD A6-6420K  ? 
AMD A6-6400K  ? 
AMD A6-5400B  ? 
AMD A6-5400K  ? 

Floating Point performance

Part number   Result
AMD Athlon II X3 405e (rev. C2)  ? 
AMD A6-3500  ? 
AMD Athlon II X3 400e  ? 
AMD A8-5500  ? 
AMD Athlon X4 740  ? 
AMD Athlon X4 730  ? 
Intel Core 2 Extreme X6800  ? 
AMD A6-6420K  ? 
AMD A6-6400K  ? 
AMD A6-5400K  ? 
AMD A6-5400B  ? 

MMX / SSE / SSE2 performance

Part number   Result
AMD Athlon II X3 415e  ? 
AMD Phenom II X3 700e  ? 
Intel Core 2 Extreme X6800  ? 
AMD Athlon II X3 405e (rev. C2)  ? 
AMD Athlon II X3 405e (rev. C3)  ? 
AMD A6-3500  ? 
AMD Athlon II X3 400e  ? 
AMD A6-6420K  ? 
AMD A6-6400K  ? 
AMD A6-5400K  ? 
AMD A6-5400B  ? 

Memory-intensive program performance

Part number   Result
AMD Athlon II X3 455  ? 
AMD A6-6420K  ? 
AMD Athlon II X4 630 (rev. C3)  ? 
AMD Athlon II X3 450  ? 
AMD Athlon II X4 630 (rev. C2)  ? 
AMD A6-6400K  ? 
AMD Athlon II X3 445  ? 
AMD Athlon II X3 440 (rev. C3)  ? 
AMD Athlon II X3 440 (rev. C2)  ? 
AMD Athlon II X4 620  ? 
AMD Athlon II X4 620e  ? 

CPU ID information for the A6-6400K

Search or browse all public submissions in our CPUID database.

Use our CPU identification tool to check features of your CPU.

NOTE: The CPU ID information below was taken from one CPU and may include features that are not present in all different steppings of the AMD A6-Series A6-6400K CPU.

CPU Family:A6-Series
Model Number:A6-6400K
Frequency:3892 MHz
Part number:
Stepping Code:GB 1315SUS
Submitted by:CPU-World
General information
Processor name (BIOS):AMD A6-6400K APU with Radeon(tm) HD Graphics
Processor name (CWID):AMD Turion(tm) X2 Ultra Dual-Core Mobile ZM-00
Compute units:1
Logical processors:2
Processor type:Original OEM Processor
Core stepping:RL-A1
CPUID signature:610F31
Family:21 (015h)
Model:19 (013h)
Stepping: 1 (01h)

Cache: L1 data L1 instruction L2
Size: 2 x 16 KB 64 KB 1 MB
Associativity: 4-way set
2-way set
16-way set
Line size: 64 bytes 64 bytes 64 bytes
Comments: Direct-mapped Direct-mapped
Shared between all cores
Shared between all cores
Instruction set extensionsAdditional instructions
MMX Advanced Bit manipulation
AMD extensions to MMX CLFLUSH
Major featuresOther features
On-chip Floating Point Unit 1 GB large page support
64-bit / Intel 64 100MHz multiplier control
NX bit/XD-bit 128-bit SSE instructions
Secure Virtual Machine (Virtualization) 36-bit page-size extensions
Turbo Core Advanced programmable interrupt controller
PowerNow! / Cool'n'Quiet Core multi-processing legacy mode
  Debugging extensions
  Extended APIC space
  FXSAVE/FXRSTOR optimizations
  Hardware P-state control
  Hardware thermal control
  Instruction based sampling
  LAHF/SAHF support in 64-bit mode
  LBR virtualization
  LOCK MOV CR0 means MOV CR8
  Lightweight profiling support
  Machine check architecture
  Machine check exception
  Memory-type range registers
  Misaligned SSE mode
  Model-specific registers
  Nested page tables
  OS visible workaround
  Page attribute table
  Page global extension
  Page-size extensions (4MB pages)
  Physical address extensions
  SVM lock
  Support for NRIP save
  TSC rate is ensured to be invariant across all states
  Temperature sensor
  Time stamp counter
  Translation Cache Extension
  Virtual 8086-mode enhancements
  Watchdog timer support

CPUs, related to AMD A6-6400K

Model Cores /
Frequency Turbo
TDP Features Price  
AMD A6-Series family, Socket FM2
   A6-5400B2 / 23.6 GHz3.8 GHz1 MB65WUnlock >
   A6-5400K2 / 23.6 GHz3.8 GHz1 MB65WUnlock$57>
   A6-6400B2 / 23.9 GHz4.1 GHz1 MB65WUnlock >
   A6-6400K2 / 23.9 GHz4.1 GHz1 MB65WUnlock$62 
   A6-6420K2 / 24 GHz4.2 GHz1 MB65WUnlock >
Other families, Piledriver micro-architecture, Socket FM2
   Athlon X2 3402 / 23.2 GHz3.6 GHz1 MB65WUnlock >
   A4-63002 / 23.7 GHz3.9 GHz1 MB65WUnlock >
   A4-63202 / 23.8 GHz4 GHz1 MB65WUnlock >
   Athlon X2 370K2 / 24 GHz4.2 GHz1 MB65WUnlock >
   FirePro A3004 / 43.4 GHz4 GHz4 MB65WUnlock >
   Athlon X4 760K4 / 43.8 GHz4.1 GHz4 MB100WUnlock >
   FirePro A3204 / 43.8 GHz4.2 GHz4 MB100WUnlock >
   A8-6600K4 / 43.9 GHz4.2 GHz4 MB100WUnlock$97>
   A10-6800B4 / 44.1 GHz4.4 GHz4 MB100WUnlock >
   A10-6800K4 / 44.1 GHz4.4 GHz4 MB100WUnlock$142>
 • Within each category, the CPUs are sorted from slower (at the top) to faster (at the bottom)
 • Background color of specs and features indicate whether they are better or worse than similar spec/feature of the A6-6400K
 • Click on the >  icon to compare any CPU in the table with the AMD A6-6400K (Javascript required).
 • The 'Price' column shows official AMD prices as of Apr 9, 2014. Prices for obsolete and tray-only processors are not provided.
 • List of related CPUs is not complete.
 • Features abbreviations:
Unlock - Unlocked multiplier

Pictures (2)

AMD A6-6400K CPU pictures
2013-06-19 17:08:03
Posted by: gshv

Top view. The processor was manufactured in the first half of April 2013.
AMD A6-6400K CPU pictures
2013-06-19 17:08:30
Posted by: gshv

Bottom view
Comments (0)

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