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Estimated Price:
$339.99 -20%
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Gaming Performance Comparison

Recommended System Requirements
Game Ryzen 9 5900X 12-Core 3.7GHz Ryzen 7 3800X 8-Core 3.9GHz
Cyberpunk 2077 73% 64%
Assassins Creed: Valhalla 64% 52%
Call of Duty: Black Ops Cold War 74% 65%
Microsoft Flight Simulator 70% 59%
Immortals: Fenyx Rising 71% 61%
FIFA 21 75% 66%
World of Warcraft: Shadowlands 58% 44%
Watch Dogs Legion 64% 52%
Genshin Impact 80% 73%
Grand Theft Auto VI 56% 41%

In terms of overall gaming performance, the AMD Ryzen 9 5900X 12-Core 3.7GHz is massively better than the AMD Ryzen 7 3800X 8-Core 3.9GHz 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 Ryzen 9 5900X was released over a year more recently than the Ryzen 7 3800X, and so the Ryzen 9 5900X 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 Ryzen 9 5900X has 4 more cores than the Ryzen 7 3800X. 12 cores is probably excessive if you mean to just run the latest games, as games are not yet able to harness this many cores. The cores in the Ryzen 7 3800X is more than enough for gaming purposes. However, if you intend on running a server with the Ryzen 9 5900X, it would seem to be a decent choice.

The Ryzen 9 5900X has 8 more threads than the Ryzen 7 3800X. Both the Ryzen 9 5900X and the Ryzen 7 3800X use hyperthreading. The Ryzen 9 5900X has 2 logical threads per physical core and the Ryzen 7 3800X has 2.

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 Ryzen 9 5900X and Ryzen 7 3800X 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 Ryzen 7 3800X has a 0.1 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. As such, we need to look elsewhere for more reliable comparisons.

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 Ryzen 9 5900X has a 2048 KB bigger L2 cache than the Ryzen 7 3800X, 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 Ryzen 9 5900X and the Ryzen 7 3800X have the same TDP of 105 Watts, and were created with the same manufacturing size of 7 nm, which means they will affect your yearly electricity bill about equally.

CPU Core Details

CPU CodenameZen 3Zen 2
MoBo SocketSocket AM4Socket AM4
Notebook CPUnono
Release Date20 Oct 202007 Jul 2019
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores12vs8
CPU Threads24vs16
Clock Speed3.8 GHzvs3.9 GHz
Turbo Frequency4.8 GHzvs4.5 GHz
Max TDP105 Wvs105 W
Lithography7 nmvs7 nm
Bit Width64 Bitvs64 Bit
Max Temperature95°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size768 KBvs512 KB
L2 Cache Size6144 KBvs4096 KB
L3 Cache Size64 MBvs32 MB
Max Memory Size-vs64 GB
Memory Channels-vs4
ECC Memory Supportnovsno
Comparison

CPU Graphics

Graphics
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Max GPU Frequency-vs-
DirectX-vs-
Displays Supported-vs-
Comparison

CPU Package and Version Specifications

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

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewThe Ryzen 9 5900X is a top-end CPU based on AMD's 7nm+ Zen 3 microarchitecture. It offers 12 physical cores (24 logical), initially clocked at 3.8GHz, which may go up to 4.8GHz using Precision Boost. It has an unlocked multiplier, therefore, it can be overclocked using traditional methods. As an AMD 'X' CPU, the Ryzen 9 5900X can use eXtended Frequency Range (XFR) for automated overclocking. It has 64MB of L3 Cache. Level 3 cache is a static memory bank of a processor and it is used to feed it instructions. This processor also supports DDR4 based RAMs with maximum memory support of 64GB. It has a maximum Thermal Power Design of 105W. This makes the Ryzen 9 5900X a relatively power-hungry CPU, although this is in-line with the high core count. Among its many features are Simultaneous Multithreading, Cool n Quiet, CoolCore Technology, Extended Frequency Range (XFR), Pure Power and Precision Boost are enabled. It features an integrated AMD Radeon Vega GPU with 11 Compute Units that offers low-end graphical performance.The Ryzen 7 3800X 8-Core 3.9GHz is a high-end CPU based on AMD's 7nm Zen 2 microarchitecture. It offers 8 physical cores (16 logical), initially clocked at 3.9GHz, which may go up to 4.5GHz using Precision Boost. It has an unlocked multiplier, therefore, it can be overclocked using traditional methods. As an AMD 'X' CPU, the Ryzen 5 3800X can use eXtended Frequency Range (XFR) for automated overclocking. It has 32MB of L3 Cache. Level 3 cache is a static memory bank of a processor and it is used to feed it instructions. This processor also supports DDR4 based RAMs with maximum memory support of 64GB. It has a maximum Thermal Power Design of 105W. It is power efficient compared to competitor processors. Among its many features are Simultaneous Multithreading, Cool n Quiet, CoolCore Technology, Extended Frequency Range (XFR), Pure Power and Precision Boost are enabled.