Intel Xeon Silver 4123: specs and benchmarks

Summary

Intel started Xeon Silver 4123 sales 1 January 2018. This is 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.

General info

Xeon Silver 4123 processor market type (desktop or notebook), architecture, sales start time and pricing.

Place in performance ranking	740
Place by popularity	not in top-100
Market segment	Server
Release date	1 January 2018 (6 years old)

Technical specs

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 (FX-9590)
Boost clock speed	3.2 GHz	of 6.2 (Core i9-14900KS)
L3 cache	11 MB	of 768 (EPYC 7373X)
Chip lithography	14 nm	of 3 (Apple M3 Max 16-Core)
64 bit support	-
Windows 11 compatibility	-
Unlocked multiplier	No

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 400 (Xeon Platinum 9282)

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	-
Status	Launched

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 786 (Xeon E5-2670 v3)
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 (Core i9-12900K)
PCI Express lanes	48	of 128 (EPYC 7551P)

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.

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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.

Relative perfomance

Overall Xeon Silver 4123 performance compared to nearest competitors among server CPUs.

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