EPYC 9555 vs Opteron 856
Primary details
Comparing Opteron 856 and EPYC 9555 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Server |
| Architecture codename | Athens (2003−2006) | Turin (2024) |
| Release date | April 2006 (18 years ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | no data | $9,826 |
Detailed specifications
Opteron 856 and EPYC 9555 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 | 1 (Single-Core) | 64 (Tetrahexaconta-Core) |
| Threads | 1 | 128 |
| Base clock speed | no data | 3.2 GHz |
| Boost clock speed | 3 GHz | 4.4 GHz |
| L1 cache | 128 KB | 80 KB (per core) |
| L2 cache | 1 MB | 1 MB (per core) |
| L3 cache | 0 KB | 256 MB (shared) |
| Chip lithography | 90 nm | 4 nm |
| Die size | no data | 8x 70.6 mm2 |
| Number of transistors | 106 million | 66,520 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Opteron 856 and EPYC 9555 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 | 8 | 2 |
| Socket | 940 | SP5 |
| Power consumption (TDP) | 92 Watt | 360 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Opteron 856 and EPYC 9555. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Opteron 856 and EPYC 9555 are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Opteron 856 and EPYC 9555. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | N/A |
Peripherals
Specifications and connection of peripherals supported by Opteron 856 and EPYC 9555.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 128 |
Pros & cons summary
| Physical cores | 1 | 64 |
| Threads | 1 | 128 |
| Chip lithography | 90 nm | 4 nm |
| Power consumption (TDP) | 92 Watt | 360 Watt |
Opteron 856 has 291.3% lower power consumption.
EPYC 9555, on the other hand, has 6300% more physical cores and 12700% more threads, and a 2150% more advanced lithography process.
We couldn't decide between Opteron 856 and EPYC 9555. We've got no test results to judge.
Should you still have questions on choice between Opteron 856 and EPYC 9555, ask them in Comments section, and we shall answer.
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