Intel Core i5-6400T 2.2GHz
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AMD FX-4300
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Gaming Performance Comparison

Recommended System Requirements
Game Core i5-6400T 2.2GHz FX-4300

In terms of overall gaming performance, the Intel Core i5-6400T 2.2GHz is massively better than the AMD FX-4300 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 i5-6400T 2.2GHz was released over a year more recently than the FX-4300, and so the Core i5-6400T 2.2GHz is likely to have better levels of support, and will be more optimized for 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 i5-6400T 2.2GHz and the FX-4300 both have 4 cores, which is not likely to be a limiting factor for gaming.

Both the Intel Core i5-6400T 2.2GHz and the AMD FX-4300 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 Core i5-6400T 2.2GHz and FX-4300 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 FX-4300 has a 1.6 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 FX-4300 has a 3072 KB bigger L2 cache than the Core i5-6400T 2.2GHz, but on the other hand, it is the Core i5-6400T 2.2GHz that has a 2 MB bigger L3 cache than the FX-4300. The L3 size of the FX-4300 is probably low enough to greatly inhibit its gaming performance in comparison to the Core i5-6400T 2.2GHz.

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 Core i5-6400T 2.2GHz has a 60 Watt lower Maximum TDP than the FX-4300, and was created with a 18 nm smaller manufacturing technology. What this means is the Core i5-6400T 2.2GHz will consume significantly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill significantly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

The Core i5-6400T 2.2GHz 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 FX-4300, 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 HD i5 6400T, 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.

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CPU Core Details

CPU CodenameSkylake-SVishera
MoBo SocketLGA 1151Socket AM3+
Notebook CPUnono
Release Date01 Sep 201523 Oct 2012
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores4vs4
CPU Threads4vs4
Clock Speed2.2 GHzvs3.8 GHz
Turbo Frequency2.8 GHzvs4 GHz
Max TDP35 Wvs95 W
Lithography14 nmvs32 nm
Bit Width64 Bitvs64 Bit
Max Temperature66°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size256 KBvs192 KB
L2 Cache Size1024 KBvs4096 KB
L3 Cache Size6 MBvs4 MB
Max Memory Size-vs-
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsHD i5 6400T
Base GPU Frequency350 MHzvs-
Max GPU Frequency950 MHzvs-
DirectX12.0vs-
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 ReviewCore i5-6400T 2.2GHz is a Super Power Efficient CPU based on the 14nm, Skylake MicroArchitecture.

It offers 4 Physical Cores (4 Logical), initially clocked at 2.2GHz, which may go up to 2.8GHz and 6MB of L3 Cache.
Among its many features, Turbo Boost 2.0 and Virtualization are activated.

The processor integrates powerful Graphics called Intel HD i5 6400T, with ?? Execution Units, initially clocked at 350MHz and that go up to 950MHz, 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 35W.

It is a powerful processor whose performance is good. It's thus capable of running most applications smoothly without any problem.
FX-4300 is a middle-class CPU based on the 32nm Piledriver architecture.

It offers 4 Physical Cores (4 Logical), initially clocked at 3.8GHz, which may go up to 4.0GHz and 4MB of L3 Cache.
Among its many features, Turbo Core and Virtualization are activated and the clock multiplier is unlocked, meaning it can be overclocked easily.

The processor DOES NOT integrated any graphics. and has a rated board TDP of 95W.

It offers average performance. It will therefore become a bottleneck in today's demanding games.

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