Xeon Silver 4509Y vs Core i9-9940X

Primary details

Comparing Core i9-9940X and Xeon Silver 4509Y processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	311	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	11.17	no data
Market segment	Desktop processor	Server
Series	Intel Core i9	no data
Architecture codename	Skylake (server) (2017−2019)	no data
Release date	19 October 2018 (5 years ago)	1 October 2023 (less than a year ago)
Launch price (MSRP)	$1,387	no data
Current price	$833 (0.6x MSRP)	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-9940X 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	14 (Tetradeca-Core)	8 (Octa-Core)
Threads	28	16
Base clock speed	3.3 GHz	2.6 GHz
Boost clock speed	4.5 GHz	4.1 GHz
Bus support	4 × 8 GT/s	no data
L1 cache	64 KB (per core)	no data
L2 cache	1 MB (per core)	no data
L3 cache	19.25 MB (shared)	22.5 MB
Chip lithography	14 nm	Intel 7 nm
Die size	484 mm2	no data
Maximum core temperature	88 °C	84 °C
64 bit support	+	-
Windows 11 compatibility	+	no data
Unlocked multiplier	Yes	No

Compatibility

Information on Core i9-9940X 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	1	no data
Socket	FCLGA2066	FCLGA4677
Power consumption (TDP)	165 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9940X and Xeon Silver 4509Y. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512	Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512
AES-NI	+	+
AVX	+	no data
Enhanced SpeedStep (EIST)	+	no data
Speed Shift	no data	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Turbo Boost Max 3.0	+	no data
Status	Discontinued	Launched

Security technologies

Core i9-9940X and Xeon Silver 4509Y technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9940X and Xeon Silver 4509Y are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9940X and Xeon Silver 4509Y. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR5 @ 4400 MT/s (1 DPC &2DPC)
Maximum memory size	128 GB	4 TB
Max memory channels	4	8
Maximum memory bandwidth	85 GB/s	no data
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

no data

Peripherals

Specifications and connection of peripherals supported by Core i9-9940X and Xeon Silver 4509Y.

PCIe version	3.0	5
PCI Express lanes	44	80

Pros & cons summary

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Recency	19 October 2018	1 October 2023
Physical cores	14	8
Threads	28	16
Power consumption (TDP)	165 Watt	125 Watt

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Should you still have questions on choice between Core i9-9940X and Xeon Silver 4509Y, ask them in Comments section, and we shall answer.

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