Xeon Gold 6558Q vs i9-9940X

Primary details

Comparing Core i9-9940X and Xeon Gold 6558Q processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	350	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	5.08	no data
Market segment	Desktop processor	Server
Series	Intel Core i9	no data
Power efficiency	10.10	no data
Architecture codename	Skylake (server) (2017−2018)	no data
Release date	19 October 2018 (6 years ago)	1 October 2023 (1 year ago)
Launch price (MSRP)	$1,387	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-9940X and Xeon Gold 6558Q 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)	32 (Dotriaconta-Core)
Threads	28	64
Base clock speed	3.3 GHz	3.2 GHz
Boost clock speed	4.5 GHz	4.1 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)	no data
L2 cache	1 MB (per core)	no data
L3 cache	19.25 MB (shared)	60 MB
Chip lithography	14 nm	Intel 7 nm
Die size	484 mm2	no data
Maximum core temperature	88 °C	66 °C
64 bit support	+	-
Windows 11 compatibility	+	no data
Unlocked multiplier	+	-

Compatibility

Information on Core i9-9940X and Xeon Gold 6558Q 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)	no data
Socket	FCLGA2066	FCLGA4677
Power consumption (TDP)	165 Watt	350 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9940X and Xeon Gold 6558Q. 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	+	-
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
Deep Learning Boost	-	+

Security technologies

Core i9-9940X and Xeon Gold 6558Q 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 Gold 6558Q 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 Gold 6558Q. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR5-5200
Maximum memory size	128 GB	4 TB
Max memory channels	4	8
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

no data

Peripherals

Specifications and connection of peripherals supported by Core i9-9940X and Xeon Gold 6558Q.

PCIe version	3.0	5.0
PCI Express lanes	44	80

Pros & cons summary

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Recency	19 October 2018	1 October 2023
Physical cores	14	32
Threads	28	64
Power consumption (TDP)	165 Watt	350 Watt

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Should you still have questions on choice between Core i9-9940X and Xeon Gold 6558Q, ask them in Comments section, and we shall answer.

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