Select any two CPUs for comparison
VS

Gaming Performance Comparison

Recommended System Requirements
Game Phenom II X3 720 Black Edition APU A6-6420K Dual-Core
Hitman 3 209% 299%
Cyberpunk 2077 130% 196%
Assassins Creed: Valhalla 209% 299%
FIFA 21 115% 177%
Grand Theft Auto VI 278% 387%
Call of Duty: Black Ops Cold War 123% 187%
Resident Evil 8 155% 229%
Genshin Impact 74% 124%
Far Cry 6 262% 368%
The Medium 294% 409%

In terms of overall gaming performance, the AMD Phenom II X3 720 Black Edition is significantly better than the AMD APU A6-6420K Dual-Core when it comes to running the latest games. This also means it will be less likely to bottleneck more powerful GPUs, allowing them to achieve more of their gaming performance potential.

The APU A6-6420K Dual-Core was released less than a year after the Phenom II X3, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

The Phenom II X3 has 1 more core than the APU A6-6420K Dual-Core. However, while the Phenom II X3 will probably perform better than the APU A6-6420K Dual-Core, both CPUs are likely to struggle with the latest games, and will almost certainly bottleneck high-end graphics cards. This should not affect games that are a few years old, and even the latest games should at least be playable on very low settings, as only recently have game developers begun to harness the power of multiple cores.

The Phenom II X3 has 1 more threads than the APU A6-6420K Dual-Core. Both CPUs have one thread 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 Phenom II X3 and APU A6-6420K Dual-Core are not from the same family of CPUs, so their clock speeds are by no means directly comparable. Bear in mind, then, that while the APU A6-6420K Dual-Core has a 1.2 GHz faster frequency, this is not always an indicator that it will be superior in performance, despite frequency being crucial when trying to avoid GPU bottlenecking. In this case, however, the difference is probably a good indicator that the Phenom II X3 is superior.

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 Phenom II X3 has a 512 KB bigger L2 cache than the APU A6-6420K Dual-Core, and although the APU A6-6420K Dual-Core does not appear to have an L3 cache, its larger L2 cache means that it wins out in this area.

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.

The APU A6-6420K Dual-Core has a 30 Watt lower Maximum TDP than the Phenom II X3, and was created with a 13 nm smaller manufacturing technology. What this means is the APU A6-6420K Dual-Core will consume significantly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill significantly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

The APU A6-6420K Dual-Core has an on-board GPU, which means that it will be capable of running basic graphics applications (i.e., games) without the need for a dedicated graphics card. The Phenom II X3, however, does not, and you will probably have to look for a dedicated card if you wish to use it at all.

For in-depth GPU comparisons with the Radeon HD 8470D, click on the following GPU overview comparison icon (visible throughout Game-Debate), and choose a GPU from the list to compare against:

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.

CPU Core Details

CPU CodenameHekaRichland
MoBo SocketSocket AM2+ / AM3Socket FM2
Notebook CPUnono
Release Date09 Feb 200901 Mar 2014
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores3vs2
CPU Threads3vs2
Clock Speed2.8 GHzvs4 GHz
Turbo Frequency-vs4.2 GHz
Max TDP95 Wvs65 W
Lithography45 nmvs32 nm
Bit Width64 Bitvs64 Bit
Max Temperature73°Cvs70°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size384 KBvs128 KB
L2 Cache Size1536 KBvs1024 KB
L3 Cache Size6 MBvs-
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsRadeon HD 8470D
Base GPU Frequency-vs800 MHz
Max GPU Frequency-vs-
DirectX-vs11.1
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 ReviewPhenom II X3 720 Black Edition is a performance processor based on the 45nm, K10 architecture.

It offers 3 Physical Cores (3 Logical), clocked at 2.8GHz and 6MB of L3 Cache.
Among its many features, Virtualization is activated and the clock multiplier is unlocked, meaning it can be overclocked easily.

The processor DOES NOT integrate any graphics. and has a rated board TDP of 95W.

It offers average performance. This means it will become a bottleneck in some demanding applications.
APU A6-6420K Dual-Core is a performance CPU based on the 32nm, Piledriver architecture.

It offers 2 Physical Cores (2 Logical), initially clocked at 4.0GHz, which may go up to 4.2GHz 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.