Pentium III 866 vs A9-9420
Primary details
Comparing A9-9420 and Pentium III 866 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2504 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | AMD Bristol Ridge | no data |
| Power efficiency | 5.94 | no data |
| Architecture codename | Stoney Ridge (2016−2019) | Coppermine T (2000) |
| Release date | 31 May 2016 (8 years ago) | 20 March 2000 (24 years ago) |
Detailed specifications
A9-9420 and Pentium III 866 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) | 1 (Single-Core) |
| Threads | 2 | 1 |
| Base clock speed | 3 GHz | no data |
| Boost clock speed | 3.6 GHz | 0.87 GHz |
| L1 cache | 160 KB | 32 KB |
| L2 cache | 1 MB (shared) | 256 KB |
| L3 cache | no data | 0 KB |
| Chip lithography | 28 nm | 180 nm |
| Die size | 125 mm2 | 106 mm2 |
| Maximum core temperature | 90 °C | no data |
| Maximum case temperature (TCase) | 74 °C | 80 °C |
| Number of transistors | 1,200 million | 28 million |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
Compatibility
Information on A9-9420 and Pentium III 866 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 | 2 |
| Socket | FT4 | 370 |
| Power consumption (TDP) | 15 Watt | 27 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by A9-9420 and Pentium III 866. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Virtualization, | no data |
| AES-NI | + | - |
| FMA | + | - |
| AVX | + | - |
Virtualization technologies
Virtual machine speed-up technologies supported by A9-9420 and Pentium III 866 are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by A9-9420 and Pentium III 866. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Radeon R5 | On certain motherboards (Chipset feature) |
Peripherals
Specifications and connection of peripherals supported by A9-9420 and Pentium III 866.
| PCIe version | 3.0 | no data |
| PCI Express lanes | 8 | no data |
Pros & cons summary
| Recency | 31 May 2016 | 20 March 2000 |
| Physical cores | 2 | 1 |
| Threads | 2 | 1 |
| Chip lithography | 28 nm | 180 nm |
| Power consumption (TDP) | 15 Watt | 27 Watt |
A9-9420 has an age advantage of 16 years, 100% more physical cores and 100% more threads, a 542.9% more advanced lithography process, and 80% lower power consumption.
We couldn't decide between A9-9420 and Pentium III 866. We've got no test results to judge.
Be aware that A9-9420 is a notebook processor while Pentium III 866 is a desktop one.
Should you still have questions on choice between A9-9420 and Pentium III 866, ask them in Comments section, and we shall answer.
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