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Gaming Performance Comparison

Recommended System Requirements
Game APU A4 Micro-6400T Quad-Core Celeron N2840 2.16GHz
Halo: Reach 260% 260%
Red Dead Redemption 2 772% 772%
Call of Duty: Modern Warfare 546% 546%
Borderlands 3 772% 772%
Star Wars: Jedi - Fallen Order 863% 863%
Cyberpunk 2077 641% 641%
FIFA 20 524% 524%
Halo: The Master Chief Collection 772% 772%
eFootball PES 2020 617% 617%
Fortnite: Chapter 2 379% 379%

In terms of overall gaming performance, the APU A4 Micro-6400T and the Celeron N2840 2.16GHz 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.

The Celeron N2840 2.16GHz was released less than a year after the APU A4 Micro-6400T, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

The APU A4 Micro-6400T has 2 more cores than the Celeron N2840 2.16GHz. With 4 cores, the APU A4 Micro-6400T is much less likely to struggle with the latest games, or bottleneck high-end graphics cards when running them.

The APU A4 Micro-6400T has 2 more threads than the Celeron N2840 2.16GHz. 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 Micro-6400T and Celeron N2840 2.16GHz 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 Celeron N2840 2.16GHz has a 1.16 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 APU A4 Micro-6400T 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 A4 Micro-6400T has a 1024 KB bigger L2 cache than the Celeron N2840 2.16GHz, but neither of the CPUs have L3 caches, so the APU A4 Micro-6400T 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 Micro-6400T has a 4 Watt lower Maximum TDP than the Celeron N2840 2.16GHz. However, the Celeron N2840 2.16GHz was created with a 6 nm smaller manufacturing technology. Overall, by taking both into account, the Celeron N2840 2.16GHz is likely the CPU with the lower heat production and power requirements, but there really isn't much in it.

The APU A4 Micro-6400T and the Celeron N2840 2.16GHz 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 CodenameMullinsBay Trail-M
MoBo SocketBGA769 (FT3b)BGA 1170
Notebook CPUyesyes
Release Date29 Apr 201420 Jul 2014
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores4vs2
CPU Threads4vs2
Clock Speed1 GHzvs2.16 GHz
Turbo Frequency1.6 GHzvs2.58 GHz
Max TDP4 Wvs8 W
Lithography28 nmvs22 nm
Bit Width64 Bitvs64 Bit
Max Temperature-vs100°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size128 KBvs112 KB
L2 Cache Size2048 KBvs1024 KB
L3 Cache Size-vs-
Max Memory Size-vs8 GB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsRadeon R3 6400TIntel HD Graphics Mobile (Bay Trail)
Base GPU Frequency350 MHzvs311 MHz
Max GPU Frequency-vs896 MHz
DirectX11.2vs11.0
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 ‚ÄčA4 Micro-6400T Quad-Core is a micro mobile processor based on the 28nm, Puma+ microarchitecture, exclusively for tablets.
It offers 4 cores clocked at 1.0GHz that go up to 1.6GHz, in Turbo Mode and 2MB of Level 2 Cache. It also offers weak integrated Graphics called Radeon R3 6400T which come clocked at 350MHz and offer 128 Shader Processing Units.
Its performance is ridiculously low and thus only suited for home browsing.
Celeron N2840 2.16GHz is a Budget Mobile Processor based on the 22nm, Silvermont Architecture.

It offers 2 Physical Cores (2 Logical), initially clocked at 2.16GHz, which may go up to 2.58GHz and 1MB of L2 Cache.
Among its many features, Burst Performance and Virtualization are activated.

The processor integrates Very Weak Graphics called Intel HD Mobile (Bay Trail), with 4 Shader Processing Units, clocked at 311MHz, which go up to 792MHz, 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 7.5W.

Benchmarks indicate its performance is just about as good as AMD's A4-4xxx Processors.

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