EPYC 9555P vs A4-4020
Primary details
Comparing A4-4020 and EPYC 9555P processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2602 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Server |
| Power efficiency | 1.16 | no data |
| Architecture codename | Richland (2013−2014) | Turin (2024) |
| Release date | January 2014 (10 years ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | no data | $7,983 |
Detailed specifications
A4-4020 and EPYC 9555P 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) | 64 (Tetrahexaconta-Core) |
| Threads | 2 | 128 |
| Base clock speed | 3.2 GHz | 3.2 GHz |
| Boost clock speed | 3.4 GHz | 4.4 GHz |
| L1 cache | 96K | 80 KB (per core) |
| L2 cache | 1 MB (shared) | 1 MB (per core) |
| L3 cache | no data | 256 MB (shared) |
| Chip lithography | 32 nm | 4 nm |
| Die size | 246 mm2 | 8x 70.6 mm2 |
| Maximum case temperature (TCase) | 70 °C | no data |
| Number of transistors | 1,303 million | 66,520 million |
| 64 bit support | + | + |
Compatibility
Information on A4-4020 and EPYC 9555P 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 | SP5 |
| Power consumption (TDP) | 65 Watt | 360 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by A4-4020 and EPYC 9555P. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| FMA | + | - |
| AVX | + | + |
| PowerNow | + | - |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by A4-4020 and EPYC 9555P are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by A4-4020 and EPYC 9555P. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-1333 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon HD 7480D | N/A |
Peripherals
Specifications and connection of peripherals supported by A4-4020 and EPYC 9555P.
| PCIe version | 2.0 | 5.0 |
| PCI Express lanes | no data | 128 |
Pros & cons summary
| Physical cores | 2 | 64 |
| Threads | 2 | 128 |
| Chip lithography | 32 nm | 4 nm |
| Power consumption (TDP) | 65 Watt | 360 Watt |
A4-4020 has 453.8% lower power consumption.
EPYC 9555P, on the other hand, has 3100% more physical cores and 6300% more threads, and a 700% more advanced lithography process.
We couldn't decide between A4-4020 and EPYC 9555P. We've got no test results to judge.
Note that A4-4020 is a desktop processor while EPYC 9555P is a server/workstation one.
Should you still have questions on choice between A4-4020 and EPYC 9555P, ask them in Comments section, and we shall answer.
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