Xeon 6556P-B vs E7-8855 v4
Primary details
Comparing Xeon E7-8855 v4 and Xeon 6556P-B 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 |
| Designer | Intel | Intel |
| Architecture codename | no data | Granite Rapids (2024−2025) |
| Release date | 1 April 2016 (8 years ago) | 24 February 2025 (recently) |
| Launch price (MSRP) | no data | $2,628 |
Detailed specifications
Xeon E7-8855 v4 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 | 14 (Tetradeca-Core) | 36 |
| Threads | 28 | 72 |
| Base clock speed | 2.1 GHz | 2.3 GHz |
| Boost clock speed | 2.8 GHz | 3.5 GHz |
| Bus rate | 8 GT/s | no data |
| L1 cache | no data | 112 KB (per core) |
| L2 cache | no data | 2 MB (per core) |
| L3 cache | 35 MB | 144 MB (shared) |
| Chip lithography | 14 nm | 5 nm |
| Die size | no data | 598 mm2 |
| Maximum core temperature | 73 °C | no data |
| Maximum case temperature (TCase) | no data | 85 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Xeon E7-8855 v4 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 | 8 | 2 |
| Socket | FCLGA2011 | Intel BGA 4368 |
| Power consumption (TDP) | 140 Watt | 215 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E7-8855 v4 and Xeon 6556P-B. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® AVX2 | no data |
| AES-NI | + | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | no data |
| TSX | + | + |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| PAE | 46 Bit | no data |
Security technologies
Xeon E7-8855 v4 and Xeon 6556P-B technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | no data |
| Secure Key | + | no data |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E7-8855 v4 and Xeon 6556P-B are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E7-8855 v4 and Xeon 6556P-B. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-1333, DDR4-1600, DDR4-1866, DDR3-1066, DDR3-1333, DDR3-1600 | DDR5 |
| Maximum memory size | 3 TB | no data |
| Max memory channels | 4 | no data |
| Maximum memory bandwidth | 102 GB/s | no data |
| ECC memory support | + | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | N/A |
Peripherals
Specifications and connection of peripherals supported by Xeon E7-8855 v4 and Xeon 6556P-B.
| PCIe version | 3.0 | 5.0 |
| PCI Express lanes | 32 | 32 |
Pros & cons summary
| Recency | 1 April 2016 | 24 February 2025 |
| Physical cores | 14 | 36 |
| Threads | 28 | 72 |
| Chip lithography | 14 nm | 5 nm |
| Power consumption (TDP) | 140 Watt | 215 Watt |
Xeon E7-8855 v4 has 53.6% lower power consumption.
Xeon 6556P-B, on the other hand, has an age advantage of 8 years, 157.1% more physical cores and 157.1% more threads, and a 180% more advanced lithography process.
We couldn't decide between Intel Xeon E7-8855 v4 and Intel Xeon 6556P-B. We've got no test results to judge.
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