Select any two CPUs for comparison
VS

Gaming Performance Comparison

Recommended System Requirements
Game Core i5-9400T 6-Core 1.8GHz Pentium Gold G5420T 2-Core 3.2GHz
Red Dead Redemption 2 7% 135%
Call of Duty: Modern Warfare 21% 74%
Cyberpunk 2077 9% 99%
Star Wars: Jedi - Fallen Order 18% 159%
Halo: Reach 56% 3%
Borderlands 3 7% 135%
FIFA 20 23% 68%
eFootball PES 2020 12% 93%
Fortnite: Chapter 2 41% 29%
Detroit: Become Human 8% 101%

In terms of overall gaming performance, the Intel Core i5-9400T 6-Core 1.8GHz is massively better than the Intel Pentium Gold G5420T 2-Core 3.2GHz 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 Core i5-9400T 6-Core was released less than a year after the Pentium Gold G5420T, 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 i5-9400T 6-Core has 4 more cores than the Pentium Gold G5420T. With 6 cores, the Core i5-9400T 6-Core is much less likely to struggle with the latest games, or bottleneck high-end graphics cards when running them.

The Core i5-9400T 6-Core has 2 more threads than the Pentium Gold G5420T. The Core i5-9400T 6-Core has one thread per physical core, whereas the Pentium Gold G5420T 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 i5-9400T 6-Core and Pentium Gold G5420T 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 Pentium Gold G5420T has a 1.5 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 i5-9400T 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 i5-9400T 6-Core has a 1024 KB bigger L2 cache than the Pentium Gold G5420T, 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 i5-9400T 6-Core and the Pentium Gold G5420T 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 i5-9400T 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 Pentium Gold G5420T, 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 RCoffee Lake S
MoBo SocketLGA 1151LGA 1151
Notebook CPUnono
Release Date23 Apr 201901 Mar 2019
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores6vs2
CPU Threads6vs4
Clock Speed1.8 GHzvs3.3 GHz
Turbo Frequency3.4 GHzvs3.2 GHz
Max TDP35 Wvs35 W
Lithography14 nmvs14 nm
Bit Width64 Bitvs64 Bit
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size384 KBvs128 KB
L2 Cache Size1536 KBvs512 KB
L3 Cache Size9 MBvs4 MB
Max Memory Size-vs64 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 Size37.5mm x 37.5mmvs37.5mm x 37.5mm
Revision-vs-
PCIe Revision-vs-
PCIe Configurations-vs-

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewThe Core i5-9400T 6-Core 1.8GHz is a mid-range CPU based on a refinement of the 14nm++ Coffee Lake microarchitecture. The 'T' suffix indicates this a low-power draw variant. It offers 6 physical cores (6 logical), initially clocked at 1.8GHz, which may go up to 3.4GHz using 6 cores with Turbo Boost. The i5-9500F has 9MB of L3 Cache. This chip supports up to 128GB DDR-2666 MHz memory and features Intel UHD 630 integrated graphics. Among its many features, Turbo Boost 2.0, Optane Memory Support, and Virtualization are activated, and its multiplier is not unlocked. This Core i5-9500T CPU offers average gaming performance and should not be a major bottleneck in any modern gaming PC in 2019. It will be able to play all modern games at 60fps comfortably on ultra graphics performance at any supported resolution without being a hindrance to the accompanying GPU. However, performance may become bottlenecked if playing at 144Hz and 1080p or lower screen resolution.The Pentium Gold G5420T 2-Core 3.2GHz is a budget processor based on the 14nm Coffee Lake architecture. It offers 2 Physical Cores (4 Logical) clocked at 3.2GHz, and 4MB of L3 Cache. Among its many features, Hyperthreading, Virtualization, and Enhanced SpeedStep are activated. The processor integrates Graphics called Intel UHD Graphics 610 (Coffee Lake), with 12 Execution Units, initially clocked at 300MHz and that goes up to 1100MHz in Turbo Mode which shares the L2 Cache and system RAM with the processor. It will struggle to run the latest AAA games at playable frame rates. Both the processor and integrated graphics have a rated board TDP of 35W. Intel's Pentium Gold G5420T 2-Core 3.2GHz offers good budget performance and is classified in the low-end range of processors. This means it will become a bottleneck in some demanding applications, particularly modern games which rely on multiple cores.

Title

Body