Xeon 6776P-B vs Phi 7255
Contents
Primary details
Comparing 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 |
| Release date | 1 October 2017 (8 years ago) | 1 October 2025 (recently) |
Detailed specifications
Xeon Phi 7255 and Xeon 6776P-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 | 68 (Octahexaconta-Core) | 72 (Doheptaconta-Core) |
| Performance-cores | no data | 72 |
| Threads | 68 | 144 |
| Base clock speed | 1.1 GHz | 2.3 GHz |
| Boost clock speed | 1.2 GHz | 3.5 GHz |
| Bus rate | no data | 0 GT/s |
| L3 cache | 34 MB L2 Cache | 288 MB |
| Chip lithography | 14 nm | Intel 3 nm |
| Maximum core temperature | 82 °C | 85 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| VID voltage range | 0.550-1.2V | no data |
Compatibility
Information on Xeon Phi 7255 and Xeon 6776P-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.
| Power consumption (TDP) | 215 Watt | 325 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon Phi 7255 and Xeon 6776P-B. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® AVX-512 | Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512, Intel® AMX |
| AES-NI | + | + |
| Enhanced SpeedStep (EIST) | no data | - |
| QuickAssist | no data | + |
| Speed Shift | no data | - |
| Turbo Boost Technology | 2.0 | 2.0 |
| Hyper-Threading Technology | no data | + |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Deep Learning Boost | - | + |
Security technologies
Xeon Phi 7255 and Xeon 6776P-B technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | + |
| SGX | - | Yes with Intel® SPS |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon Phi 7255 and Xeon 6776P-B are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon Phi 7255 and Xeon 6776P-B. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-2400 | DDR5 |
| Maximum memory size | 384 GB | 2.25 TB |
| Max memory channels | 6 | 8 |
| Maximum memory bandwidth | 115.2 GB/s | no data |
| ECC memory support | + | + |
Peripherals
Specifications and connection of peripherals supported by Xeon Phi 7255 and Xeon 6776P-B.
| PCIe version | 3.0 | Gen4, Gen5 |
| PCI Express lanes | 36 | 48 |
| Integrated LAN | no data | + |
Pros & cons summary
| Recency | 1 October 2017 | 1 October 2025 |
| Physical cores | 68 | 72 |
| Threads | 68 | 144 |
| Power consumption (TDP) | 215 Watt | 325 Watt |
Xeon Phi 7255 has 51.2% lower power consumption.
Xeon 6776P-B, on the other hand, has an age advantage of 8 years, and 5.9% more physical cores and 111.8% more threads.
We couldn't decide between Intel Xeon Phi 7255 and Intel Xeon 6776P-B. We've got no test results to judge.
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