Select any two CPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game Atom Z3745 1.33GHz APU A4 Micro-6400T Quad-Core
Cyberpunk 2077 669% 641%
Red Dead Redemption 2 685% 656%
Doom Eternal 645% 617%
Microsoft Flight Simulator 869% 833%
Resident Evil 3 Remake 746% 715%
Need For Speed Heat 665% 637%
Grand Theft Auto VI 1215% 1166% 823% 789%
Star Citizen 645% 617%
Star Wars: Jedi - Fallen Order 977% 937%

In terms of overall gaming performance, the AMD APU A4 Micro-6400T Quad-Core is marginally better than the Intel Atom Z3745 1.33GHz 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 Micro-6400T was released less than a year after the Atom Z3745 1.33GHz, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

The Atom Z3745 1.33GHz and the APU A4 Micro-6400T both have 4 cores, which is not likely to be a limiting factor for gaming.

Both the Intel Atom Z3745 1.33GHz and the AMD APU A4 Micro-6400T Quad-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 Atom Z3745 1.33GHz and APU A4 Micro-6400T 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 Atom Z3745 1.33GHz has a 0.33 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 enough that it possibly indicates the superiority of the .

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 Atom Z3745 1.33GHz and the APU A4 Micro-6400T have the same L2 cache size, and neither CPU appears to have an L3 cache. In this case, the Atom Z3745 1.33GHz has a 96 KB bigger L1 cache, so would probably provide better performance than the APU A4 Micro-6400T, at least 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 Atom Z3745 1.33GHz has a 2 Watt lower Maximum TDP than the APU A4 Micro-6400T, and was created with a 6 nm smaller manufacturing technology. What this means is the Atom Z3745 1.33GHz 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 Atom Z3745 1.33GHz and the APU A4 Micro-6400T 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 CodenameBay Trail-TMullins
MoBo SocketNot sureBGA769 (FT3b)
Notebook CPUyesyes
Release Date01 Apr 201429 Apr 2014
CPU LinkGD LinkGD Link

CPU Technical Specifications

CPU Cores4vs4
CPU Threads4vs4
Clock Speed1.33 GHzvs1 GHz
Turbo Frequency1.86 GHzvs1.6 GHz
Max TDP2 Wvs4 W
Lithography22 nmvs28 nm
Bit Width64 Bitvs64 Bit
Max Temperature105°Cvs-
Virtualization Technologynovsno

CPU Cache and Memory

L1 Cache Size224 KBvs128 KB
L2 Cache Size2048 KBvs2048 KB
L3 Cache Size-vs-
Max Memory Size-vs-
Memory Channels-vs1
ECC Memory Supportnovsno

CPU Graphics

GraphicsIntel HD Graphics Desktop (Bay Trail)Radeon R3 6400T
Base GPU Frequency-vs350 MHz
Max GPU Frequency-vs-
Displays Supported-vs-

CPU Package and Version Specifications

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

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewThe Intel Atom Z3745 is a mobile chip built on the 22nm Silvermont microarchitecture and was released during the 2nd quarter of 2014. It features 4 physical cores initially clocked at 1.33 GHz, which may go up to 1.86 GHz in Turbo mode. It has an L1 and L2 cache of 224 Kb and 2048 Kb respectively, and does not have an L3 cache. It integrates the Intel HD Graphics (Bay Trail) GPU and so is only capable of running very non-demanding games. It does however have an extremely low TDP of just 2W.APU ‚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.