Xeon 6556P-B vs Ryzen 9 PRO 3900
Primary details
Comparing Ryzen 9 PRO 3900 and Xeon 6556P-B processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 308 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Server |
| Series | AMD Ryzen 9 | no data |
| Power efficiency | 28.66 | no data |
| Designer | AMD | Intel |
| Architecture codename | Zen 2 (2017−2020) | Granite Rapids (2024−2025) |
| Release date | 30 September 2019 (5 years ago) | 24 February 2025 (recently) |
| Launch price (MSRP) | no data | $2,628 |
Detailed specifications
Ryzen 9 PRO 3900 and Xeon 6556P-B 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 | 12 (Dodeca-Core) | 36 |
| Threads | 24 | 72 |
| Base clock speed | 3.1 GHz | 2.3 GHz |
| Boost clock speed | 4.3 GHz | 3.5 GHz |
| L1 cache | 768 KB | 112 KB (per core) |
| L2 cache | 6 MB | 2 MB (per core) |
| L3 cache | 64 MB | 144 MB (shared) |
| Chip lithography | 7 nm, 12 nm | 5 nm |
| Die size | no data | 598 mm2 |
| Maximum case temperature (TCase) | no data | 85 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
Compatibility
Information on Ryzen 9 PRO 3900 and Xeon 6556P-B 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 (Uniprocessor) | 2 |
| Socket | Socket AM4 | Intel BGA 4368 |
| Power consumption (TDP) | 65 Watt | 215 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 PRO 3900 and Xeon 6556P-B. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
| TSX | - | + |
| Precision Boost 2 | + | no data |
Security technologies
Ryzen 9 PRO 3900 and Xeon 6556P-B technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 PRO 3900 and Xeon 6556P-B are enumerated here.
| AMD-V | + | - |
| VT-d | no data | + |
| VT-x | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 PRO 3900 and Xeon 6556P-B. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-3200 | DDR5 |
| Maximum memory size | 128 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 51.196 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | - | N/A |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 PRO 3900 and Xeon 6556P-B.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 32 |
Pros & cons summary
| Recency | 30 September 2019 | 24 February 2025 |
| Physical cores | 12 | 36 |
| Threads | 24 | 72 |
| Chip lithography | 7 nm | 5 nm |
| Power consumption (TDP) | 65 Watt | 215 Watt |
Ryzen 9 PRO 3900 has 230.8% lower power consumption.
Xeon 6556P-B, on the other hand, has an age advantage of 5 years, 200% more physical cores and 200% more threads, and a 40% more advanced lithography process.
We couldn't decide between AMD Ryzen 9 PRO 3900 and Intel Xeon 6556P-B. We've got no test results to judge.
Note that Ryzen 9 PRO 3900 is a desktop processor while Xeon 6556P-B is a server/workstation one.
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