Xeon Silver 4509Y vs Silver 4123

Primary details

Comparing Xeon Silver 4123 and Xeon Silver 4509Y processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	850	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Server	Server
Power efficiency	8.17	no data
Architecture codename	no data	Sapphire Rapids (2023−2024)
Release date	1 January 2018 (6 years ago)	14 December 2023 (1 year ago)
Launch price (MSRP)	no data	$563

Detailed specifications

Xeon Silver 4123 and Xeon Silver 4509Y 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	8 (Octa-Core)	8 (Octa-Core)
Threads	16	16
Base clock speed	3 GHz	2.6 GHz
Boost clock speed	3.2 GHz	4.1 GHz
L1 cache	no data	80 KB (per core)
L2 cache	no data	2 MB (per core)
L3 cache	11 MB	22.5 MB (shared)
Chip lithography	14 nm	Intel 7 nm
Maximum case temperature (TCase)	no data	84 °C
64 bit support	-	+
Windows 11 compatibility	-	no data

Compatibility

Information on Xeon Silver 4123 and Xeon Silver 4509Y 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.

Number of CPUs in a configuration	no data	2
Socket	FCLGA3647	FCLGA4677
Power consumption (TDP)	105 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon Silver 4123 and Xeon Silver 4509Y. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX-512	Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512
AES-NI	+	+
AVX	-	+
vPro	+	+
Enhanced SpeedStep (EIST)	no data	+
Speed Shift	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Turbo Boost Max 3.0	-	no data
Deep Learning Boost	-	+

Security technologies

Xeon Silver 4123 and Xeon Silver 4509Y technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	no data	+
SGX	no data	Yes with Intel® SPS
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon Silver 4123 and Xeon Silver 4509Y are enumerated here.

VT-d	no data	+
VT-x	+	+
EPT	no data	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon Silver 4123 and Xeon Silver 4509Y. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2400	DDR5 @ 4400 MT/s (1 DPC &2DPC)
Maximum memory size	512 GB	4 TB
Max memory channels	6	8
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by Xeon Silver 4123 and Xeon Silver 4509Y.

PCIe version	3.0	5
PCI Express lanes	48	80

Pros & cons summary

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Recency	1 January 2018	14 December 2023
Power consumption (TDP)	105 Watt	125 Watt

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Should you still have questions on choice between Xeon Silver 4123 and Xeon Silver 4509Y, ask them in Comments section, and we shall answer.

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