A9-9420 vs A8-5557M
Aggregate performance score
A8-5557M outperforms A9-9420 by a moderate 19% based on our aggregate benchmark results.
Primary details
Comparing A8-5557M and A9-9420 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2396 | 2520 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | AMD A-Series | AMD Bristol Ridge |
| Power efficiency | 3.06 | 5.99 |
| Architecture codename | Richland (2013−2014) | Stoney Ridge (2016−2019) |
| Release date | 1 June 2013 (11 years ago) | 31 May 2016 (8 years ago) |
Detailed specifications
A8-5557M and A9-9420 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 | 4 (Quad-Core) | 2 (Dual-core) |
| Threads | 4 | 2 |
| Base clock speed | 2.1 GHz | 3 GHz |
| Boost clock speed | 3.1 GHz | 3.6 GHz |
| L1 cache | 128 KB (per core) | 160 KB |
| L2 cache | 1 MB (per core) | 1 MB (shared) |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 32 nm | 28 nm |
| Die size | 246 mm2 | 125 mm2 |
| Maximum core temperature | no data | 90 °C |
| Maximum case temperature (TCase) | 71 °C | 74 °C |
| Number of transistors | 1,178 million | 1,200 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on A8-5557M and A9-9420 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 | FP2 | FT4 |
| Power consumption (TDP) | 35 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by A8-5557M and A9-9420. You'll probably need this information if you require some particular technology.
| Instruction set extensions | 86x SSE (1, 2, 3, 3S, 4.1, 4.2, 4A),-64, AES, AVX, FMA | Virtualization, |
| AES-NI | + | + |
| FMA | + | + |
| AVX | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by A8-5557M and A9-9420 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by A8-5557M and A9-9420. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon HD 8550G (554 - 720 MHz) | Radeon R5 |
Peripherals
Specifications and connection of peripherals supported by A8-5557M and A9-9420.
| PCIe version | no data | 3.0 |
| PCI Express lanes | no data | 8 |
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.
Cinebench 10 32-bit single-core
Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.
Cinebench 10 32-bit multi-core
Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.
wPrime 32
wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.
Cinebench 11.5 64-bit multi-core
Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported in this version.
Cinebench 11.5 64-bit single-core
Cinebench R11.5 is an old benchmark by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version loads a single thread with ray tracing to render a glossy room full of crystal spheres and light sources.
TrueCrypt AES
TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.
Pros & cons summary
| Performance score | 1.13 | 0.95 |
| Recency | 1 June 2013 | 31 May 2016 |
| Physical cores | 4 | 2 |
| Threads | 4 | 2 |
| Chip lithography | 32 nm | 28 nm |
| Power consumption (TDP) | 35 Watt | 15 Watt |
A8-5557M has a 18.9% higher aggregate performance score, and 100% more physical cores and 100% more threads.
A9-9420, on the other hand, has an age advantage of 2 years, a 14.3% more advanced lithography process, and 133.3% lower power consumption.
The A8-5557M is our recommended choice as it beats the A9-9420 in performance tests.
Should you still have questions on choice between A8-5557M and A9-9420, ask them in Comments section, and we shall answer.
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