Ryzen 5 8540U vs A9-9420
Aggregate performance score
Ryzen 5 8540U outperforms A9-9420 by a whopping 1139% based on our aggregate benchmark results.
Primary details
Comparing A9-9420 and Ryzen 5 8540U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2505 | 662 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | AMD Bristol Ridge | no data |
| Power efficiency | 5.94 | 39.44 |
| Architecture codename | Stoney Ridge (2016−2019) | Hawk Point-U (Zen 4 + Zen 4c) (2023) |
| Release date | 31 May 2016 (8 years ago) | 6 December 2023 (less than a year ago) |
Detailed specifications
A9-9420 and Ryzen 5 8540U 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) | 6 (Hexa-Core) |
| Threads | 2 | 12 |
| Base clock speed | 3 GHz | 3.2 GHz |
| Boost clock speed | 3.6 GHz | 4.9 GHz |
| L1 cache | 160 KB | 64 KB (per core) |
| L2 cache | 1 MB (shared) | 1 MB (per core) |
| L3 cache | no data | 16 MB (shared) |
| Chip lithography | 28 nm | 4 nm |
| Die size | 125 mm2 | 137 mm2 |
| Maximum core temperature | 90 °C | 100 °C |
| Maximum case temperature (TCase) | 74 °C | no data |
| Number of transistors | 1,200 million | 20,900 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on A9-9420 and Ryzen 5 8540U 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 | FT4 | FP7 |
| Power consumption (TDP) | 15 Watt | 28 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by A9-9420 and Ryzen 5 8540U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Virtualization, | AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3 |
| AES-NI | + | + |
| FMA | + | - |
| AVX | + | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by A9-9420 and Ryzen 5 8540U are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by A9-9420 and Ryzen 5 8540U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Radeon R5 | AMD Radeon 740M |
Peripherals
Specifications and connection of peripherals supported by A9-9420 and Ryzen 5 8540U.
| PCIe version | 3.0 | 4.0 |
| PCI Express lanes | 8 | 14 |
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 | 0.96 | 11.89 |
| Recency | 31 May 2016 | 6 December 2023 |
| Physical cores | 2 | 6 |
| Threads | 2 | 12 |
| Chip lithography | 28 nm | 4 nm |
| Power consumption (TDP) | 15 Watt | 28 Watt |
A9-9420 has 86.7% lower power consumption.
Ryzen 5 8540U, on the other hand, has a 1138.5% higher aggregate performance score, an age advantage of 7 years, 200% more physical cores and 500% more threads, and a 600% more advanced lithography process.
The Ryzen 5 8540U is our recommended choice as it beats the A9-9420 in performance tests.
Should you still have questions on choice between A9-9420 and Ryzen 5 8540U, ask them in Comments section, and we shall answer.
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