Intel Xeon Silver 4123: specs and benchmarks
Aggregate performance score
Xeon Silver 4123 provides acceptable benchmark performance at 9.07% of a leader's which is a 96-core EPYC 9655P.
Summary
Intel started Xeon Silver 4123 sales 1 January 2018. This is a desktop processor primarily aimed at office systems. It has 8 cores and 16 threads, and is based on 14 nm manufacturing technology, with a maximum frequency of 3200 MHz and a locked multiplier.
Compatibility-wise, this is FCLGA3647 processor with a TDP of 105 Watt. It supports DDR4-2400 memory.
Primary details
Xeon Silver 4123 processor market type (desktop or notebook), architecture, sales start time and pricing.
| Place in the ranking | 850 | |
| Place by popularity | not in top-100 | |
| Market segment | Server | |
| Power efficiency | 8.18 | of 100.00 (Ryzen Z1 Extreme) |
| Release date | 1 January 2018 (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 | 8 (Octa-Core) | |
| Threads | 16 | |
| Base clock speed | 3 GHz | of 4.7 GHz (Ryzen 9 7900X) |
| Boost clock speed | 3.2 GHz | of 6.2 GHz (Core i9-14900KS) |
| L3 cache | 11 MB | of 1152 MB (EPYC 9684X) |
| Chip lithography | 14 nm | of 3 nm (Core Ultra 9 285K) |
| 64 bit support | - | |
| Windows 11 compatibility | - |
Compatibility
Information on Xeon Silver 4123 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.
| Socket | FCLGA3647 | |
| Power consumption (TDP) | 105 Watt | of 500 Watt (Xeon 6960P) |
Technologies and extensions
Technological capabilities and additional instructions supported by Xeon Silver 4123. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® AVX-512 | |
| AES-NI | + | |
| vPro | + | |
| Speed Shift | + | |
| Turbo Boost Technology | 2.0 | |
| Hyper-Threading Technology | + | |
| TSX | + | |
| Turbo Boost Max 3.0 | - |
Security technologies
Processor technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + |
Virtualization technologies
Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.
| VT-x | + |
Memory specs
Types, maximum amount and channel number of RAM supported by Xeon Silver 4123's memory controller. Depending on the motherboard, higher memory frequency may be supported.
| Supported memory types | DDR4-2400 | |
| Maximum memory size | 512 GB | of 6 TiB (EPYC 9654) |
| Max memory channels | 6 | of 12 (Xeon Platinum 9221) |
| ECC memory support | + |
Peripherals
Specifications and connection types of supported peripherals.
| PCIe version | 3.0 | of 5.0 (EPYC 9655P) |
| PCI Express lanes | 48 | of 128 (EPYC 9655P) |
Benchmark performance
Single-core and multi-core benchmark results of Xeon Silver 4123. Overall benchmark performance is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Send your test results of Xeon Silver 4123.
AMD equivalent
According to our data, the closest AMD alternative to Xeon Silver 4123 is Opteron 6278, which is slower by 5% and lower by 32 positions in our ranking.
Here are some closest AMD rivals to Xeon Silver 4123:
Similar processors
Here is our recommendation of several processors that are more or less close in performance to the one reviewed.
