Phenom X4 9850B vs A6-6400K
Aggregate performance score
Phenom X4 9850B outperforms A6-6400K by a significant 29% based on our aggregate benchmark results.
Primary details
Comparing A6-6400K and Phenom X4 9850B processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2519 | 2330 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD A-Series (Desktop) | no data |
| Power efficiency | 1.38 | 1.23 |
| Architecture codename | Richland (2013−2014) | Agena (2007−2008) |
| Release date | 1 June 2013 (11 years ago) | August 2008 (16 years ago) |
Detailed specifications
A6-6400K and Phenom X4 9850B 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 | 2 (Dual-core) | 4 (Quad-Core) |
| Threads | 2 | 4 |
| Base clock speed | 3.9 GHz | no data |
| Boost clock speed | 4.1 GHz | 2.5 GHz |
| L1 cache | 96 KB | 128 KB (per core) |
| L2 cache | 1024 KB | 512 KB (per core) |
| L3 cache | 0 KB | 2 MB (shared) |
| Chip lithography | 32 nm | 65 nm |
| Die size | 246 mm2 | 285 mm2 |
| Maximum core temperature | 70 °C | no data |
| Maximum case temperature (TCase) | 70 °C | no data |
| Number of transistors | 1,178 million | 450 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on A6-6400K and Phenom X4 9850B 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 | FM2 | AM2+ |
| Power consumption (TDP) | 65 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by A6-6400K and Phenom X4 9850B. You'll probably need this information if you require some particular technology.
| Instruction set extensions | MMX, SSE1-4a, AES, ABM, AVX, BMI1, AMD64, VT, EVP, Turbo Core 3.0 | no data |
| AES-NI | + | - |
| FMA | FMA4 | - |
| AVX | + | - |
| PowerNow | + | - |
| PowerGating | + | - |
| VirusProtect | + | - |
Virtualization technologies
Virtual machine speed-up technologies supported by A6-6400K and Phenom X4 9850B are enumerated here.
| AMD-V | + | + |
| IOMMU 2.0 | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by A6-6400K and Phenom X4 9850B. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-1866 | no data |
| Max memory channels | 2 | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon HD 8470D | no data |
| จำนวนพาธไลน์ | 192 | no data |
| Enduro | + | - |
| Switchable graphics | + | - |
| UVD | + | - |
| VCE | + | - |
Graphics interfaces
Available interfaces and connections of A6-6400K and Phenom X4 9850B integrated GPUs.
| DisplayPort | + | - |
| HDMI | + | - |
Graphics API support
APIs supported by A6-6400K and Phenom X4 9850B integrated GPUs, sometimes API versions are included.
| DirectX | DirectX® 11 | no data |
Peripherals
Specifications and connection of peripherals supported by A6-6400K and Phenom X4 9850B.
| PCIe version | 2.0 | no data |
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.
Pros & cons summary
| Performance score | 0.95 | 1.23 |
| Physical cores | 2 | 4 |
| Threads | 2 | 4 |
| Chip lithography | 32 nm | 65 nm |
| Power consumption (TDP) | 65 Watt | 95 Watt |
A6-6400K has a 103.1% more advanced lithography process, and 46.2% lower power consumption.
Phenom X4 9850B, on the other hand, has a 29.5% higher aggregate performance score, and 100% more physical cores and 100% more threads.
The Phenom X4 9850B is our recommended choice as it beats the A6-6400K in performance tests.
Should you still have questions on choice between A6-6400K and Phenom X4 9850B, ask them in Comments section, and we shall answer.
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