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Gaming Performance Comparison

Recommended System Requirements
Game Core i3-6320 3.9GHz Athlon 64 FX-51
Mount and Blade 2: Bannerlord 126% 1440%
Call of Duty Warzone 25% 748%
Cyberpunk 2077 43% 872%
Resident Evil 3 Remake 57% 969%
Doom Eternal 100% 1261%
Call of Duty: Modern Warfare 2 Remastered 67% 126%
Grand Theft Auto VI 144% 1561%
Beyond Good & Evil 2 80% 1124%
Half-Life: Alyx 80% 1124%
Microsoft Flight Simulator 80% 1124%

In terms of overall gaming performance, the Intel Core i3-6320 3.9GHz is massively better than the AMD Athlon 64 FX-51 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 i3-6320 3.9GHz was released over three years more recently than the Athlon 64 FX-51, and so the Core i3-6320 3.9GHz is likely to have far better levels of support, and will be much more optimized and ultimately superior to the Athlon 64 FX-51 when running the latest games.

The Core i3-6320 3.9GHz has 1 more core than the Athlon 64 FX-51. However, while the Core i3-6320 3.9GHz will probably perform better than the Athlon 64 FX-51, both CPUs are likely to struggle with the latest games, and will almost certainly bottleneck high-end graphics cards. This should not affect games that are a few years old, and even the latest games should at least be playable on very low settings, as only recently have game developers begun to harness the power of multiple cores.

The Core i3-6320 3.9GHz has 3 more threads than the Athlon 64 FX-51. The Athlon 64 FX-51 has one thread per physical core, whereas the Core i3-6320 3.9GHz 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 i3-6320 3.9GHz and Athlon 64 FX-51 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 Core i3-6320 3.9GHz has a 1.7 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 i3-6320 3.9GHz 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 Athlon 64 FX-51 has a 512 KB bigger L2 cache than the Core i3-6320 3.9GHz, and although the Athlon 64 FX-51 does not appear to have an L3 cache, its larger L2 cache means that it wins out 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 Core i3-6320 3.9GHz has a 42 Watt lower Maximum TDP than the Athlon 64 FX-51, and was created with a 116 nm smaller manufacturing technology. What this means is the Core i3-6320 3.9GHz 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 i3-6320 3.9GHz 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 64 FX-51, 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 i3 6320, 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 CodenameSkylake-SSledgeHammer
MoBo SocketLGA 1151Socket 939
Notebook CPUnono
Release Date01 Sep 201523 Sep 2003
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores2vs1
CPU Threads4vs1
Clock Speed3.9 GHzvs2.2 GHz
Turbo Frequency-vs-
Max TDP47 Wvs89 W
Lithography14 nmvs130 nm
Bit Width64 Bitvs64 Bit
Max Temperature100°Cvs70°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size128 KBvs128 KB
L2 Cache Size512 KBvs1024 KB
L3 Cache Size4 MBvs-
Max Memory Size-vs-
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsHD i3 6320
Base GPU Frequency350 MHzvs-
Max GPU Frequency1150 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 i3-6320 3.9GHz is a Middle-Class Processor based on the 14nm, Skylake MicroArchitecture.

It offers 2 Physical Cores (4 Logical), initially clocked at 3.9GHz and 4MB of L3 Cache.
Among its many features, HyperThreading and Virtualization are activated.

The Processor Integrates Powerful Graphics called HD i3-6320, with 24 Execution Units, initially clocked at 350MHz and that go up to 1150MHz, 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 47W.

It is a powerful processor whose performance is good. It's thus capable of running most applications smoothly without any problem.
Athlon 64 FX-51 is an entry-level Processor based on the 130nm K8 micro-architecture.

It offers 1 Physical Core (1 Logical), clocked at 2.4GHz and 1MB of L2 Cache.
No relevant technologies are activated in a way the processor doesn't even support Virtualization.

The processor DOES NOT integrate any graphics. and has a rated board TDP of 89W.

Its performance is below the average and so most demanding games will not run optimally.