AMD APU A6-6400K Dual-Core
AMD APU A6-6400K Dual-Core
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Gaming Performance Comparison

In terms of overall gaming performance, the A6-6400K Dual-Core and the A6-6400K Dual-Core are equal when it comes to running the latest games. This means they will be about the same in terms of bottlenecking (or not bottlenecking) GPUs.

Both the APU A6-6400K Dual-Core and the APU A6-6400K Dual-Core were released at the same time, so are likely to be quite similar.

The A6-6400K Dual-Core and the A6-6400K Dual-Core both have 2 cores, and so are quite likely to struggle with the latest games, or at least bottleneck high-end graphics cards when running them. With a decent accompanying GPU, the A6-6400K Dual-Core and the A6-6400K Dual-Core may still be able to run slightly older games fairly effectively.

The has more threads than the . Both CPUs have one thread per physical core. The A6-6400K Dual-Core has one thread per physical core, whereas the A6-6400K Dual-Core uses hyperthreading, as it has 1 logical threads per physical core.

Multiple threads are useful for improving the performance of multi-threaded applications. Additional cores and their accompanying thread will always be beneficial for multi-threaded applications. Hyperthreading will be beneficial for applications optimized for it, but it may slow others down. For games, the number of threads is largely irrelevant, as long as you have at least 2 cores (preferably 4), and hyperthreading can sometimes even hit performance.

More important for gaming than the number of cores and threads is the clock rate. Problematically, unless the two CPUs are from the same family, this can only serve as a general guide and nothing like an exact comparison, because the clock cycles per instruction (CPI) will vary so much.

The A6-6400K Dual-Core and the A6-6400K Dual-Core are from the same family of CPUs, and thus their clock speeds are directly comparable. That isn't particularly helpful, however, as the A6-6400K Dual-Core and the A6-6400K Dual-Core provide identical clock rates and thus extremely similar performance. The two CPUs even provide identical turbo clock rates, so if there are performance differences, we need to look elsewhere.

Aside from the clock rate, the next-most important CPU features for PC game performance are L2 and L3 cache size. Faster than RAM, the more cache available, the more data that can be stored for lightning-fast retrieval. L1 Cache is not usually an issue anymore for gaming, with most high-end CPUs eking out about the same L1 performance, and L2 is more important than L3 - but L3 is still important if you want to reach the highest levels of performance. Bear in mind that although it is better to have a larger cache, the larger it is, the higher the latency, so a balance has to be struck.

The A6-6400K Dual-Core and the A6-6400K Dual-Core have the same L2 cache size, and neither CPU appears to have an L3 cache. They even have the same L1 cache size, so are identical in terms of cache size.

The maximum Thermal Design Power is the power in Watts that the CPU will consume in the worst case scenario. The lithography is the semiconductor manufacturing technology being used to create the CPU - the smaller this is, the more transistors that can be fit into the CPU, and the closer the connections. For both the lithography and the TDP, it is the lower the better, because a lower number means a lower amount of power is necessary to run the CPU, and consequently a lower amount of heat is produced.

Both the A6-6400K Dual-Core and the A6-6400K Dual-Core have the same TDP of 65 Watts, and were created with the same manufacturing size of 32 nm, which means they will affect your yearly electricity bill about equally.

The A6-6400K Dual-Core and the A6-6400K Dual-Core both have an on-board GPU, which means that they will be capable of running basic graphics applications (i.e., games) without the need for a dedicated graphics card.

For an in-depth GPU comparison, click on the GPU comparison icon that you can find throughout Game-Debate:

On-board GPUs tend to be fairly awful in comparison to dedicated cards from the likes of AMD or Nvidia, but as they are built into the CPU, they also tend to be cheaper and require far less power to run (this makes them a good choice for laptops). We would recommend a dedicated card for running the latest games, but integrated GPUs are improving all the time and casual gamers may find less recent games perform perfectly acceptably.

Can I Run It

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CPU Core Details

CPU CodenameRichlandRichland
MoBo SocketSocket FM2Socket FM2
Notebook CPUnono
Release Date04 Jun 201304 Jun 2013
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores2vs2
CPU Threads2vs2
Clock Speed3.9 GHzvs3.9 GHz
Turbo Frequency4.1 GHzvs4.1 GHz
Max TDP65 Wvs65 W
Lithography32 nmvs32 nm
Bit Width64 Bitvs64 Bit
Max Temperature70°Cvs70°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size128 KBvs128 KB
L2 Cache Size1024 KBvs1024 KB
L3 Cache Size-vs-
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsRadeon HD 8470DRadeon HD 8470D
Base GPU Frequency800 MHzvs800 MHz
Max GPU Frequency-vs-
DirectX11.1vs11.1
Displays Supported-vs-
Comparison

CPU Package and Version Specifications

Package Size-vs-
Revision-vs-
PCIe Revision-vs-
PCIe Configurations-vs-

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewAPU A6-6400K Dual-Core is a performance CPU based on the 32nm, Piledriver architecture.

It offers 2 Physical Cores (2 Logical), initially clocked at 3.9GHz, which may go up to 4.1GHz and 1MB of L2 Cache.
Among its many features, Turbo Core and Virtualization are activated and the processor has the clock multiplier unlocked, meaning it can be overclocked easily.

The processor integrates weak Graphics called Radeon HD 8470D, with 192 Shader Processing Units, clocked at 800MHz, which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 65W.

It offers average performance. This means it will become a bottleneck in some demanding applications.
APU A6-6400K Dual-Core is a performance CPU based on the 32nm, Piledriver architecture.

It offers 2 Physical Cores (2 Logical), initially clocked at 3.9GHz, which may go up to 4.1GHz and 1MB of L2 Cache.
Among its many features, Turbo Core and Virtualization are activated and the processor has the clock multiplier unlocked, meaning it can be overclocked easily.

The processor integrates weak Graphics called Radeon HD 8470D, with 192 Shader Processing Units, clocked at 800MHz, which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 65W.

It offers average performance. This means it will become a bottleneck in some demanding applications.