Intel Xeon Phi 7255: specs and benchmarks
Summary
Intel started Xeon Phi 7255 sales 1 October 2017. This is desktop processor primarily aimed at professional systems. It has 68 cores and 68 threads, and is based on 14 nm manufacturing technology, with a maximum frequency of 1200 MHz and a locked multiplier.
Compatibility-wise, this is processor with a TDP of 215 Watt. It supports DDR4-2400 memory.
Primary Details
Xeon Phi 7255 processor market type (desktop or notebook), architecture, sales start time and pricing.
| Place in performance ranking | not rated | |
| Place by popularity | not in top-100 | |
| Market segment | Server | |
| Release date | 1 October 2017 (6 years ago) |
Detailed Specifications
Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.
| Physical cores | 68 (Octahexaconta-Core) | |
| Threads | 68 | |
| Base clock speed | 1.1 GHz | of 4.7 (FX-9590) |
| Boost clock speed | 1.2 GHz | of 6.2 (Core i9-14900KS) |
| L3 cache | 34 MB L2 Cache | of 768 (EPYC 7373X) |
| Chip lithography | 14 nm | of 3 (Apple M3 Max 16-Core) |
| Maximum core temperature | 82 °C | of 110 (Atom x7-E3950) |
| 64 bit support | + | |
| Windows 11 compatibility | - | |
| Unlocked multiplier | No | |
| VID voltage range | 0.550-1.2V |
Compatibility
Information on Xeon Phi 7255 compatibility with other computer components and devices: 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 | of 400 (Xeon Platinum 9282) |
Technologies and extensions
Technological capabilities and additional instructions supported by Xeon Phi 7255. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® AVX-512 | |
| AES-NI | + | |
| Turbo Boost Technology | 2.0 | |
| Idle States | + | |
| Thermal Monitoring | + | |
| Status | Launched |
Security technologies
Processor technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | |
| EDB | + | |
| MPX | - | |
| SGX | - |
Virtualization technologies
Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.
| VT-d | + | |
| VT-x | + | |
| EPT | + |
Memory specs
Types, maximum amount and channel number of RAM supported by Xeon Phi 7255's memory controller. Depending on the motherboard, higher memory frequency may be supported.
| Supported memory types | DDR4-2400 | |
| Maximum memory size | 384 GB | of 786 (Xeon E5-2670 v3) |
| Max memory channels | 6 | of 12 (Xeon Platinum 9221) |
| Maximum memory bandwidth | 115.2 GB/s | of 460.8 (EPYC 9124) |
| ECC memory support | + |
Peripherals
Specifications and connection types of supported peripherals.
| PCIe version | 3.0 | of 5 (Core i9-12900K) |
| PCI Express lanes | 36 | of 128 (EPYC 7551P) |
