A6-6400K vs Ryzen 9 5900
Aggregate performance score
Ryzen 9 5900 outperforms A6-6400K by a whopping 2198% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 9 5900 and A6-6400K processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 242 | 2501 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD Ryzen 9 | AMD A-Series (Desktop) |
| Power efficiency | 31.52 | 1.37 |
| Architecture codename | Vermeer (2020−2024) | Richland (2013−2014) |
| Release date | 12 January 2021 (3 years ago) | 1 June 2013 (11 years ago) |
Detailed specifications
Ryzen 9 5900 and A6-6400K basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 12 (Dodeca-Core) | 2 (Dual-core) |
| Threads | 24 | 2 |
| Base clock speed | 3 GHz | 3.9 GHz |
| Boost clock speed | 4.7 GHz | 4.1 GHz |
| Multiplier | 30 | no data |
| L1 cache | 768 KB | 96 KB |
| L2 cache | 6 MB | 1024 KB |
| L3 cache | 64 MB | 0 KB |
| Chip lithography | 7 nm, 12 nm | 32 nm |
| Die size | 81 mm2 | 246 mm2 |
| Maximum core temperature | no data | 70 °C |
| Maximum case temperature (TCase) | 95 °C | 70 °C |
| Number of transistors | 4,150 million | 1,178 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | - |
| Unlocked multiplier | + | + |
Compatibility
Information on Ryzen 9 5900 and A6-6400K compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 | 1 |
| Socket | AM4 | FM2 |
| Power consumption (TDP) | 65 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 5900 and A6-6400K. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | MMX, SSE1-4a, AES, ABM, AVX, BMI1, AMD64, VT, EVP, Turbo Core 3.0 |
| AES-NI | + | + |
| FMA | - | FMA4 |
| AVX | + | + |
| PowerNow | - | + |
| PowerGating | - | + |
| VirusProtect | - | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 5900 and A6-6400K are enumerated here.
| AMD-V | + | + |
| IOMMU 2.0 | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 5900 and A6-6400K. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-3200 | DDR3-1866 |
| Maximum memory size | 128 GB | no data |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | 51.196 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | - | AMD Radeon HD 8470D |
| Number of pipelines | - | 192 |
| Enduro | - | + |
| Switchable graphics | - | + |
| UVD | - | + |
| VCE | - | + |
Graphics interfaces
Available interfaces and connections of Ryzen 9 5900 and A6-6400K integrated GPUs.
| DisplayPort | - | + |
| HDMI | - | + |
Graphics API support
APIs supported by Ryzen 9 5900 and A6-6400K integrated GPUs, sometimes API versions are included.
| DirectX | - | DirectX® 11 |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 5900 and A6-6400K.
| PCIe version | 4.0 | 2.0 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Pros & cons summary
| Performance score | 22.06 | 0.96 |
| Recency | 12 January 2021 | 1 June 2013 |
| Physical cores | 12 | 2 |
| Threads | 24 | 2 |
| Chip lithography | 7 nm | 32 nm |
Ryzen 9 5900 has a 2197.9% higher aggregate performance score, an age advantage of 7 years, 500% more physical cores and 1100% more threads, and a 357.1% more advanced lithography process.
The Ryzen 9 5900 is our recommended choice as it beats the A6-6400K in performance tests.
Should you still have questions on choice between Ryzen 9 5900 and A6-6400K, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
