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Gaming Performance Comparison

Recommended System Requirements
Game Pentium G2020 2.9GHz APU A6-6400K Dual-Core
Cyberpunk 2077 138% 236%
Red Dead Redemption 2 143% 243%
Call of Duty: Modern Warfare 108% 193%
Doom Eternal 130% 225%
Microsoft Flight Simulator 200% 323%
Grand Theft Auto VI 307% 474%
Need For Speed Heat 137% 234%
Wolcen: Lords of Mayhem 112% 199%
Star Wars: Jedi - Fallen Order 233% 370%
Planet Zoo 180% 295%

In terms of overall gaming performance, the Intel Pentium G2020 2.9GHz is massively better than the AMD APU A6-6400K 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 A6-6400K Dual-Core was released less than a year after the Pentium G2020 2.9GHz, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

The Pentium G2020 2.9GHz and the APU 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 Pentium G2020 2.9GHz and the APU A6-6400K Dual-Core may still be able to run slightly older games fairly effectively.

Both the Intel Pentium G2020 2.9GHz and the AMD APU A6-6400K Dual-Core 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 Pentium G2020 2.9GHz and APU A6-6400K 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 A6-6400K Dual-Core has a 1 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 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 APU A6-6400K Dual-Core has a 512 KB bigger L2 cache than the Pentium G2020 2.9GHz, and although the APU A6-6400K 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 Pentium G2020 2.9GHz has a 10 Watt lower Maximum TDP than the APU A6-6400K Dual-Core, and was created with a 10 nm smaller manufacturing technology. What this means is the Pentium G2020 2.9GHz will consume slightly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill slightly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

The Pentium G2020 2.9GHz and the APU 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.

CPU Core Details

CPU CodenameIvy BridgeRichland
MoBo SocketLGA 1155/Socket H2Socket FM2
Notebook CPUnono
Release Date20 Jan 201304 Jun 2013
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores2vs2
CPU Threads2vs2
Clock Speed2.9 GHzvs3.9 GHz
Turbo Frequency-vs4.1 GHz
Max TDP55 Wvs65 W
Lithography22 nmvs32 nm
Bit Width64 Bitvs64 Bit
Max Temperature-vs70°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size128 KBvs128 KB
L2 Cache Size512 KBvs1024 KB
L3 Cache Size3 MBvs-
Max Memory Size-vs-
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsIntel HD Graphics Desktop (Ivy Bridge)Radeon HD 8470D
Base GPU Frequency350 MHzvs800 MHz
Max GPU Frequency1300 MHzvs-
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 ReviewPentium G2020 2.9GHz is a budget processor based on the 22nm, Ivy Bridge architecture.

It offers 2 Physical Cores (2 Logical), clocked at 2.9GHz and 3MB of L3 Cache.
Among its many features, Virtualization is activated.

The processor integrates very weak Graphics called Intel HD Graphics Desktop (Ivy Bridge), with 6 Execution Units, initially clocked at 650MHz and that go up to 1050MHz, in Turbo Mode which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 55W.

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.

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