AMD Ryzen 7 5800X3D vs AMD Ryzen 9 3900X
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CPU comparison with benchmarks
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| AMD Ryzen 7 5800X3D | AMD Ryzen 9 3900X | |
CPU comparisonAMD Ryzen 7 5800X3D or AMD Ryzen 9 3900X - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.
The AMD Ryzen 7 5800X3D has 8 cores with 16 threads and clocks with a maximum frequency of 4.50 GHz. Up to 128 GB of memory is supported in 2 memory channels. The AMD Ryzen 7 5800X3D was released in Q4/2020. The AMD Ryzen 9 3900X has 12 cores with 24 threads and clocks with a maximum frequency of 4.60 GHz. The CPU supports up to 128 GB of memory in 2 memory channels. The AMD Ryzen 9 3900X was released in Q3/2019. |
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| AMD Ryzen 7 (68) | Family | AMD Ryzen 9 (35) |
| AMD Ryzen 5000 (12) | CPU group | AMD Ryzen 3000 (15) |
| 4 | Generation | 3 |
| Vermeer (Zen 3) | Architecture | Matisse (Zen 2) |
| Desktop / Server | Segment | Desktop / Server |
| -- | Predecessor | -- |
| AMD Ryzen 7 7800X3D | Successor | AMD Ryzen 9 5900X |
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CPU Cores and Base FrequencyThe AMD Ryzen 7 5800X3D has 8 CPU cores and can calculate 16 threads in parallel. The clock frequency of the AMD Ryzen 7 5800X3D is 3.40 GHz (4.50 GHz) while the AMD Ryzen 9 3900X has 12 CPU cores and 24 threads can calculate simultaneously. The clock frequency of the AMD Ryzen 9 3900X is at 3.80 GHz (4.60 GHz). |
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| AMD Ryzen 7 5800X3D | Characteristic | AMD Ryzen 9 3900X |
| 8 | Cores | 12 |
| 16 | Threads | 24 |
| normal | Core architecture | normal |
| Yes | Hyperthreading | Yes |
| No | Overclocking ? | Yes |
| 3.40 GHz | Frequency | 3.80 GHz |
| 4.50 GHz | Turbo Frequency (1 Core) | 4.60 GHz |
| 4.20 GHz | Turbo Frequency (All Cores) | 4.00 GHz |
Memory & PCIeThe AMD Ryzen 7 5800X3D can use up to 128 GB of memory in 2 memory channels. The maximum memory bandwidth is 51.2 GB/s. The AMD Ryzen 9 3900X supports up to 128 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 51.2 GB/s. |
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| AMD Ryzen 7 5800X3D | Characteristic | AMD Ryzen 9 3900X |
| DDR4-3200 | Memory | DDR4-3200 |
| 128 GB | Max. Memory | 128 GB |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 51.2 GB/s | Max. Bandwidth | 51.2 GB/s |
| Yes | ECC | Yes |
| 4.00 MB | L2 Cache | 6.00 MB |
| 96.00 MB | L3 Cache | 64.00 MB |
| 4.0 | PCIe version | 4.0 |
| 20 | PCIe lanes | 20 |
| 39.4 GB/s | PCIe Bandwidth | 39.4 GB/s |
Thermal ManagementThe thermal design power (TDP for short) of the AMD Ryzen 7 5800X3D is 105 W, while the AMD Ryzen 9 3900X has a TDP of 105 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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| AMD Ryzen 7 5800X3D | Characteristic | AMD Ryzen 9 3900X |
| 105 W | TDP (PL1 / PBP) | 105 W |
| -- | TDP (PL2) | 142 W |
| -- | TDP up | -- |
| -- | TDP down | -- |
| 90 °C | Tjunction max. | 95 °C |
Technical detailsThe AMD Ryzen 7 5800X3D is manufactured in 7 nm and has 100.00 MB cache. The AMD Ryzen 9 3900X is manufactured in 7 nm and has a 70.00 MB cache. |
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| AMD Ryzen 7 5800X3D | Characteristic | AMD Ryzen 9 3900X |
| 7 nm | Technology | 7 nm |
| Chiplet | Chip design | Chiplet |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| SSE4a, SSE4.1, SSE4.2, AVX2, FMA3 | ISA extensions | SSE4a, SSE4.1, SSE4.2, AVX2, FMA3 |
| AM4 (PGA 1331) | Socket | AM4 (PGA 1331) |
| AMD-V, SVM | Virtualization | AMD-V, SVM |
| Yes | AES-NI | Yes |
| Windows 10, Windows 11, Linux | Operating systems | Windows 10, Windows 11, Linux |
| Q4/2020 | Release date | Q3/2019 |
| 449 $ | Release price | 485 $ |
| show more data | show more data | |
8C 16T @ 3.40 GHz (4.50 GHz) buy now on Amazon and save!
12C 24T @ 3.80 GHz (4.60 GHz) buy now on Amazon and save!
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Rate these processors
Average performance in benchmarks
⌀ Single core performance in 6 CPU benchmarks
⌀ Multi core performance in 8 CPU benchmarks
Cinebench 2024 (Single-Core)
The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.50 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.60 GHz |
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Cinebench 2024 (Multi-Core)
The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.50 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.60 GHz |
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Cinebench R23 (Single-Core)
Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.50 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.60 GHz |
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Cinebench R23 (Multi-Core)
Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.20 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.00 GHz |
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Geekbench 5, 64bit (Single-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.50 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.60 GHz |
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Geekbench 5, 64bit (Multi-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.20 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.00 GHz |
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Geekbench 6 (Single-Core)
Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.50 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.60 GHz |
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Geekbench 6 (Multi-Core)
Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.20 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.00 GHz |
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Cinebench R20 (Single-Core)
Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.50 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.60 GHz |
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Cinebench R20 (Multi-Core)
Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.20 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.00 GHz |
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Blender 3.1 Benchmark
In the Blender Benchmark 3.1, the scenes "monster", "junkshop" and "classroom" are rendered and the time required by the system is measured. In our benchmark we test the CPU and not the graphics card. Blender 3.1 was presented as a standalone version in March 2022.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.20 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.00 GHz |
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Estimated results for PassMark CPU Mark
Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.20 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.00 GHz |
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Cinebench R15 (Single-Core)
Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.50 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.60 GHz |
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Cinebench R15 (Multi-Core)
Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.20 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.00 GHz |
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Blender 2.81 (bmw27)
Blender is a free 3D graphics software for rendering (creating) 3D bodies, which can also be textured and animated in the software. The Blender benchmark creates predefined scenes and measures the time (s) required for the entire scene. The shorter the time required, the better. We selected bmw27 as the benchmark scene.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.20 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.00 GHz |
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CPU-Z Benchmark 17 (Single-Core)
The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
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AMD Ryzen 7 5800X3D
8C 16T @ 4.20 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 4.00 GHz |
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CPU-Z Benchmark 17 (Multi-Core)
The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
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AMD Ryzen 7 5800X3D
8C 16T @ 3.40 GHz |
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AMD Ryzen 9 3900X
12C 24T @ 3.80 GHz |
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CPU performance per watt (efficiency)
Efficiency of the processor under full load in the Cinebench R23 (multi-core) benchmark. The benchmark result is divided by the average energy required (CPU package power in watts). The higher the value, the more efficient the CPU is under full load.
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AMD Ryzen 7 5800X3D
15,125 CB R23 MC @ 96 W |
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AMD Ryzen 9 3900X
3.80 GHz |
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Devices using this processor |
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| AMD Ryzen 7 5800X3D | AMD Ryzen 9 3900X |
| Unknown | Unknown |
News and articles for the AMD Ryzen 7 5800X3D and the AMD Ryzen 9 3900X
Comparison of the two processors
In the comparison between the AMD Ryzen 7 5800X3D and the AMD Ryzen 9 3900X, there are two desktop processors from AMD that could hardly be more different. The AMD Ryzen 9 3900X still comes from AMD's Zen 2 CPU architecture (Matisse). It has 12 CPU cores that clock at 3.8 GHz in the base. Using Turbo mode, the clock frequency can be increased to up to 4.6 GHz with load on just one CPU core; 4.0 GHz is still possible with multi-core load.The AMD Ryzen 7 5800X3D comes from the successor architecture "Vermeer", which has Zen 3 CPU cores. The AMD Ryzen 7 5800X3D only has 8 cores, which also clock quite low at 3.4 GHz. This is due to the 3D cache that the processor comes with and which does not support very fast clock frequencies. In Turbo mode, 4.5 GHz is also possible here.
Thanks to its additional 64 MB Level 3 cache, the AMD Ryzen 7 5800X3D has a total of 96 MB Level 3 cache, which is even more than the 12-core processor AMD Ryzen 9 3900X, which has 64 MB Level 3 cache. The larger Level 3 cache can be an advantage in certain scenarios such as computer games that run at the FPS limit.
Both processors can connect external devices with PCIe 4.0, with a maximum of 20 PCIe lines available each. RAM is supported up to 128 GB, reaching 51.2 GB/s in dual-channel mode. Unofficially, faster memory frequencies are also quite possible; up to DDR4-3600 actually works without any problems on almost every AMD Ryzen 3000/5000 processor.
The TDP of the two processors is 105 watts each, and the processor can also absorb a little more energy via PBO. The 105 watts are actually enough for both processors and even higher energy consumption only very rarely results in an increase in performance.
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