Athlon II X4 638 vs A6-9400
Aggregate performance score
A6-9400 outperforms Athlon II X4 638 by a significant 20% based on our aggregate benchmark results.
Primary details
Comparing A6-9400 and Athlon II X4 638 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2040 | 2194 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | 2.49 | 2.07 |
| Architecture codename | Bristol Ridge (2016−2019) | Llano (2011−2012) |
| Release date | 16 March 2019 (5 years ago) | 6 February 2012 (12 years ago) |
Detailed specifications
A6-9400 and Athlon II X4 638 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 | 3.4 GHz | 2.7 GHz |
| Boost clock speed | 3.7 GHz | 2.7 GHz |
| L1 cache | 160K | 128 KB (per core) |
| L2 cache | 1 MB (shared) | 1 MB (per core) |
| L3 cache | no data | 0 KB |
| Chip lithography | 28 nm | 32 nm |
| Die size | 250 mm2 | 228 mm2 |
| Number of transistors | 3,100 million | 1,178 million |
| 64 bit support | + | + |
| Windows 11 compatibility | no data | - |
Compatibility
Information on A6-9400 and Athlon II X4 638 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 | FM1 |
| Power consumption (TDP) | 65 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by A6-9400 and Athlon II X4 638. You'll probably need this information if you require some particular technology.
| AES-NI | + | - |
| FMA | + | - |
| AVX | + | - |
Virtualization technologies
Virtual machine speed-up technologies supported by A6-9400 and Athlon II X4 638 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by A6-9400 and Athlon II X4 638. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-2400 | DDR3 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Radeon R5 | no data |
Peripherals
Specifications and connection of peripherals supported by A6-9400 and Athlon II X4 638.
| PCIe version | 3.0 | no data |
| PCI Express lanes | 8 | 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 | 1.71 | 1.42 |
| Recency | 16 March 2019 | 6 February 2012 |
| Physical cores | 2 | 4 |
| Threads | 2 | 4 |
| Chip lithography | 28 nm | 32 nm |
A6-9400 has a 20.4% higher aggregate performance score, an age advantage of 7 years, and a 14.3% more advanced lithography process.
Athlon II X4 638, on the other hand, has 100% more physical cores and 100% more threads.
The A6-9400 is our recommended choice as it beats the Athlon II X4 638 in performance tests.
Should you still have questions on choice between A6-9400 and Athlon II X4 638, ask them in Comments section, and we shall answer.
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