Xeon 6766P-B vs Gold 6558Q
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 2023 (2 years ago) | 1 October 2025 (recently) |
Detailed specifications
Xeon Gold 6558Q and Xeon 6766P-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 | 32 (Dotriaconta-Core) | 64 (Tetrahexaconta-Core) |
| Performance-cores | no data | 64 |
| Threads | 64 | 128 |
| Base clock speed | 3.2 GHz | 2.3 GHz |
| Boost clock speed | 4.1 GHz | 3.5 GHz |
| Bus rate | no data | 0 GT/s |
| L3 cache | 60 MB | 256 MB |
| Chip lithography | Intel 7 nm | Intel 3 nm |
| Maximum core temperature | 66 °C | 85 °C |
| 64 bit support | - | + |
Compatibility
Information on Xeon Gold 6558Q and Xeon 6766P-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.
| Socket | FCLGA4677 | no data |
| Power consumption (TDP) | 350 Watt | 305 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon Gold 6558Q and Xeon 6766P-B. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, 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 | + | - |
| Turbo Boost Technology | 2.0 | 2.0 |
| Hyper-Threading Technology | + | + |
| TSX | + | - |
| Deep Learning Boost | + | + |
Security technologies
Xeon Gold 6558Q and Xeon 6766P-B technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
| SGX | Yes with Intel® SPS | Yes with Intel® SPS |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon Gold 6558Q and Xeon 6766P-B are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon Gold 6558Q and Xeon 6766P-B. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5-5200 | DDR5 |
| Maximum memory size | 4 TB | 2.25 TB |
| Max memory channels | 8 | 8 |
| ECC memory support | + | + |
Peripherals
Specifications and connection of peripherals supported by Xeon Gold 6558Q and Xeon 6766P-B.
| PCIe version | 5.0 | Gen4, Gen5 |
| PCI Express lanes | 80 | 48 |
| Integrated LAN | no data | + |
Pros & cons summary
| Recency | 1 October 2023 | 1 October 2025 |
| Physical cores | 32 | 64 |
| Threads | 64 | 128 |
| Power consumption (TDP) | 350 Watt | 305 Watt |
Xeon 6766P-B has an age advantage of 2 years, 100% more physical cores and 100% more threads, and 14.8% lower power consumption.
We couldn't decide between Intel Xeon Gold 6558Q and Intel Xeon 6766P-B. We've got no test results to judge.
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