Xeon w5-2455X vs i9-9940X

Primary details

Comparing Core i9-9940X and Xeon w5-2455X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	350	212
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	5.09	62.22
Market segment	Desktop processor	Server
Series	Intel Core i9	no data
Power efficiency	10.10	11.26
Architecture codename	Skylake (server) (2017−2018)	Sapphire Rapids (2023−2024)
Release date	19 October 2018 (6 years ago)	15 February 2023 (1 year ago)
Launch price (MSRP)	$1,387	$1,039

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon w5-2455X has 1122% better value for money than i9-9940X.

Detailed specifications

Core i9-9940X and Xeon w5-2455X 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)	12 (Dodeca-Core)
Threads	28	24
Base clock speed	3.3 GHz	3.2 GHz
Boost clock speed	4.5 GHz	4.6 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
Multiplier	33	no data
L1 cache	64 KB (per core)	80 KB (per core)
L2 cache	1 MB (per core)	2 MB (per core)
L3 cache	19.25 MB (shared)	30 MB
Chip lithography	14 nm	Intel 7 nm
Die size	484 mm2	no data
Maximum core temperature	88 °C	no data
Maximum case temperature (TCase)	no data	77 °C
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	+	+

Compatibility

Information on Core i9-9940X and Xeon w5-2455X 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 (Uniprocessor)	1
Socket	FCLGA2066	FCLGA4677
Power consumption (TDP)	165 Watt	200 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9940X and Xeon w5-2455X. 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® SSE4.1, Intel® AMX, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI	+	+
AVX	+	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Turbo Boost Max 3.0	+	+
Deep Learning Boost	-	+

Security technologies

Core i9-9940X and Xeon w5-2455X technologies aimed at improving security, for example, by protecting against hacks.

TXT	no data	+
EDB	+	+
SGX	no data	-
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9940X and Xeon w5-2455X 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 w5-2455X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR5-4800
Maximum memory size	128 GB	2 TB
Max memory channels	4	4
Maximum memory bandwidth	85.33 GB/s	no data
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

N/A

Peripherals

Specifications and connection of peripherals supported by Core i9-9940X and Xeon w5-2455X.

PCIe version	3.0	5.0
PCI Express lanes	44	64

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score 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.

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Pros & cons summary

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Performance score	17.61	23.80
Recency	19 October 2018	15 February 2023
Physical cores	14	12
Threads	28	24
Power consumption (TDP)	165 Watt	200 Watt

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Should you still have questions on choice between Core i9-9940X and Xeon w5-2455X, ask them in Comments section, and we shall answer.

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