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Gaming Performance Comparison

Recommended System Requirements
Game Core i5-8400T 6-Core 1.7GHz Athlon 3000G 2-Core 3.5GHz
Cyberpunk 2077 89% 76%
Hyper Scape 53% 42%
Assassins Creed: Valhalla 89% 76%
Far Cry 6 114% 98%
Valorant 9% 16%
Horizon: Zero Dawn 53% 42%
Watch Dogs Legion 50% 40%
Death Stranding 65% 54%
Grand Theft Auto VI 123% 107%
Microsoft Flight Simulator 53% 42%

In terms of overall gaming performance, the AMD Athlon 3000G 2-Core 3.5GHz is noticeably better than the Intel Core i5-8400T 6-Core 1.7GHz 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 Athlon 3000G 2-Core was released less than a year after the Core i5-8400T 6-Core, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

Both CPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings (assuming they are accompanied by equivalently powerful GPUs).

The Core i5-8400T 6-Core has 4 more cores than the Athlon 3000G 2-Core. With 6 cores, the Core i5-8400T 6-Core is much less likely to struggle with the latest games, or bottleneck high-end graphics cards when running them.

The Core i5-8400T 6-Core has 2 more threads than the Athlon 3000G 2-Core. The Core i5-8400T 6-Core has one thread per physical core, whereas the Athlon 3000G 2-Core uses hyperthreading and has 2 logical threads 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 Core i5-8400T 6-Core and Athlon 3000G 2-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 Athlon 3000G 2-Core has a 1.8 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 Core i5-8400T 6-Core 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 Core i5-8400T 6-Core has a 512 KB bigger L2 cache than the Athlon 3000G 2-Core, which means that it, at worst, wins out in this area, and at best, will provide superior gaming performance and will work much better with high-end graphics cards.

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.

Both the Core i5-8400T 6-Core and the Athlon 3000G 2-Core have the same TDP of 35 Watts, and were created with the same manufacturing size of 14 nm, which means they will affect your yearly electricity bill about equally.

The Core i5-8400T 6-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 3000G 2-Core, 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 Intel UHD Graphics 630, 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 CodenameCoffee Lake SRaven Ridge
MoBo SocketLGA 1151Socket AM4
Notebook CPUnono
Release Date02 Apr 201819 Nov 2019
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores6vs2
CPU Threads6vs4
Clock Speed1.7 GHzvs3.5 GHz
Turbo Frequency3.3 GHzvs-
Max TDP35 Wvs35 W
Lithography14 nmvs14 nm
Bit Width64 Bitvs64 Bit
Max Temperature100°Cvs95°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size384 KBvs192 KB
L2 Cache Size1536 KBvs1024 KB
L3 Cache Size9 MBvs4 MB
Max Memory Size-vs32 GB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsIntel UHD Graphics 630
Base GPU Frequency350 MHzvs-
Max GPU Frequency1150 MHzvs-
DirectX12vs-
Displays Supported-vs-
Comparison

CPU Package and Version Specifications

Package Size149 mm˛vs 209.78 mm˛
Revision-vs-
PCIe Revision-vs-
PCIe Configurations-vs-

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewThe Intel Core i5-8400T 6-Core 1.7GHz is a low to mid-range power-efficient CPU based on Intel's 8th Gen 14nm Coffee Lake S microarchitecture. It offers 6 physical cores (6 logical), initially clocked at 1.7GHz across all six cores, rising to a maximum of 3.3GHz with Turbo Boost 2.0 enabled. The i5-8400T does not have an unlocked multiplier and therefore cannot be overclocked using traditional methods. It has 9MB of L3 Cache. Level 3 cache is a static memory bank of a processor and it is used to feed it instructions. The Core i3-8300T has support for up to 64GB of dual-channel DDR4-2400 memory. It has a maximum Thermal Power Design of 35W, making it a very power efficient processor. Among its many features are Intel Enhanced Speedstep, Turbo Boost 2.0, Virtualization, SSE3, AVX2 and SSE 4.2. This CPU is likely to offer average computational performance and could become a bottleneck in some of the most CPU-intensive AAA games from 2020 onward.The Athlon 3000G 2-Core 3.5GHz is a budget desktop APU based on AMD's 14nm Zen Raven Ridge microarchitecture. It offers 2 physical cores (4 logical), clocked at 3.5 GHz base clock speed. It's the first ever Athlon Zen processor to enable overclocking out of the box. It has an unlocked multiplier and therefore can be overclocked using traditional methods. It has 4MB of L3 Cache. Level 3 cache is a static memory bank of a processor and it is used to feed it instructions. It also has 1MB L2 Cache and 192KB L1 Cache. This processor also supports DDR4 based RAMs with maximum memory support of 32GB. The AMD Athlon 3000G has a maximum Thermal Power Design of 35W, making it a low-end, power-efficient CPU. Among its many features are Cool n Quiet, CoolCore Technology, Extended Frequency Range (XFX), Pure Power and Precision Boost are enabled. It features an integrated Vega 3 GPU with 3 Execution units, 192 Shaders, and a maximum clock speed of 1,000MHz. This is a low-end graphics chip that can run less demanding eSports titles at 720p.