AMD Ryzen 9 3900X vs Intel Core i9-9940X

General info

Comparing Core i9-9940X and Ryzen 9 3900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	289	222
Place by popularity	not in top-100	not in top-100
Value for money	11.52	38.26
Market segment	Desktop processor	Desktop processor
Series	Intel Core i9	AMD Ryzen 9
Architecture codename	Skylake (server) (2017−2019)	Matisse (Zen 2) (2019−2020)
Release date	8 October 2018 (5 years old)	7 July 2019 (4 years old)
Launch price (MSRP)	$1,387	$499
Current price	$900 (0.6x MSRP)	$388 (0.8x MSRP)

Ryzen 9 3900X has 232% better value for money than i9-9940X.

Technical specs

Core i9-9940X and Ryzen 9 3900X 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	3.8 GHz
Boost clock speed	4.5 GHz	4.6 GHz
Bus support	4 × 8 GT/s	no data
L1 cache	896 KB	768 KB
L2 cache	14 MB	6 MB
L3 cache	19.25 MB (shared)	64 MB
Chip lithography	14 nm	7 nm, 12 nm
Die size	484 mm2	no data
Maximum core temperature	88 °C	95 °C
Number of transistors	no data	19,200 million
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	Yes	Yes

Compatibility

Information on Core i9-9940X and Ryzen 9 3900X 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	1 (Uniprocessor)
Socket	FCLGA2066	AM4
Power consumption (TDP)	165 Watt	105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9940X and Ryzen 9 3900X. 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	no data
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	no data
Turbo Boost Max 3.0	+	no data
Status	Discontinued	no data

Security technologies

Core i9-9940X and Ryzen 9 3900X technologies aimed at improving security, for example, by protecting against hacks.

EDB

+

no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9940X and Ryzen 9 3900X are enumerated here.

AMD-V	no data	+
VT-d	+	no data
VT-x	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9940X and Ryzen 9 3900X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR4 Dual-channel
Maximum memory size	128 GB	128 GB
Max memory channels	4	2
Maximum memory bandwidth	85 GB/s	51.196 GB/s
ECC memory support	-	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

-

Peripherals

Specifications and connection of peripherals supported by Core i9-9940X and Ryzen 9 3900X.

PCIe version	3.0	no data
PCI Express lanes	44	no data

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.

Ryzen 9 3900X outperforms Core i9-9940X by 16% based on our aggregated benchmark results.

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Advantages and disadvantages

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Performance score	18.32	21.32
Recency	8 October 2018	7 July 2019
Physical cores	14	12
Threads	28	24
Cost	$1387	$499
Chip lithography	14 nm	7 nm
Power consumption (TDP)	165 Watt	105 Watt

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Should you still have questions on choice between Core i9-9940X and Ryzen 9 3900X, ask them in Comments section, and we shall answer.

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