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Gaming Performance Comparison

Recommended System Requirements
Game APU A4-4020 Dual-Core Athlon 64 X2 Dual Core 6400+
Red Dead Redemption 2 371% 306%
Call of Duty: Modern Warfare 249% 201%
Zombieland: Double Tap - Road Trip 371% 306%
Cyberpunk 2077 300% 245%
Microsoft Flight Simulator 413% 342%
Borderlands 3 371% 306%
FIFA 20 237% 191%
The Outer Worlds 312% 255%
eFootball PES 2020 288% 234%
Ghost Recon Breakpoint 421% 348%

In terms of overall gaming performance, the AMD Athlon 64 X2 Dual Core 6400+ is noticeably better than the AMD APU A4-4020 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 A4-4020 Dual-Core was released over three years more recently than the Athlon 64 X2, and so the APU A4-4020 Dual-Core is likely to have far better levels of support, and will be much more optimized and ultimately superior to the Athlon 64 X2 when running the latest games.

The APU A4-4020 Dual-Core and the Athlon 64 X2 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 APU A4-4020 Dual-Core and the Athlon 64 X2 may still be able to run slightly older games fairly effectively.

Both the AMD APU A4-4020 Dual-Core and the AMD Athlon 64 X2 Dual Core 6400+ have the same number of threads. 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 APU A4-4020 Dual-Core and Athlon 64 X2 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 A4-4020 Dual-Core and the Athlon 64 X2 both have the same clock frequency, this is by no means an indicator that the two CPUs will provide the same level of performance. As such, we need to look elsewhere for more reliable comparisons.

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 Athlon 64 X2 has a 1024 KB bigger L2 cache than the APU A4-4020 Dual-Core, but neither of the CPUs have L3 caches, so the Athlon 64 X2 wins out in this area with its larger L2 cache.

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 A4-4020 Dual-Core has a 60 Watt lower Maximum TDP than the Athlon 64 X2, and was created with a 58 nm smaller manufacturing technology. What this means is the APU A4-4020 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 A4-4020 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 Athlon 64 X2, 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 7480D, 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 Codename-Windsor
MoBo SocketSocket FM2Socket AM2
Notebook CPUnono
Release Date01 Mar 201420 Aug 2007
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores2vs2
CPU Threads2vs2
Clock Speed3.2 GHzvs3.2 GHz
Turbo Frequency3.4 GHzvs-
System Bus -vs1000 MHz
Max TDP65 Wvs125 W
Lithography32 nmvs90 nm
Bit Width64 Bitvs64 Bit
Max Temperature70°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size96 KBvs256 KB
L2 Cache Size1024 KBvs2048 KB
L3 Cache Size-vs-
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsRadeon HD 7480D
Base GPU Frequency723 MHzvs-
Max GPU Frequency-vs-
DirectX11vs-
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 A4-4020 Dual-Core is an entry-level CPU based on the 32nm, Piledriver architecture.

It offers 2 Physical Cores (2 Logical), initially clocked at 3.2GHz, which may go up to 3.4GHz and 1MB of L2 Cache.
Among its many features, Turbo Core and Virtualization are activated.

The processor integrates very weak Graphics called Radeon HD 7480D, with 128 Shader Processing Units, clocked at 720MHz, which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 65W.

Its performance is below the average and so most demanding games will not run optimally.
Athlon 64 X2 Dual Core 6400+ is a middle-class Processor based on the 90nm K8 micro-architecture.

It offers 2 Physical Cores (2 Logical), clocked at 3.2GHz and 2MB of L2 Cache.
Among its many features, Virtualization is activated.

The processor DOES NOT integrated any graphics. and has a rated board TDP of 125W.

It offers average performance. It will therefore become a bottleneck in today's demanding games.

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