Intel Core i9-9920X vs Core i9-7940X

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General info

Comparing Core i9-7940X and Core i9-9920X processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking324346
Place by popularitynot in top-100not in top-100
Value for money3.7515.89
Market segmentDesktop processorDesktop processor
SeriesIntel Core i9Intel Core i9
Architecture codenameSkylake (server) (2017−2019)Skylake (server) (2017−2019)
Release date30 May 2017 (6 years old)8 October 2018 (5 years old)
Launch price (MSRP)$1,399$1,189
Current price$1899 (1.4x MSRP)$567 (0.5x MSRP)
Value for money

Performance per price, higher is better.

i9-9920X has 324% better value for money than i9-7940X.

Technical specs

Core i9-7940X and Core i9-9920X 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 cores14 (Tetradeca-Core)12 (Dodeca-Core)
Threads2824
Base clock speed3.1 GHz3.5 GHz
Boost clock speed4.4 GHz4.5 GHz
Bus support4 × 8 GT/s4 × 8 GT/s
L1 cache896 KB768 KB
L2 cache14 MB12 MB
L3 cache19.25 MB (shared)19.25 MB (shared)
Chip lithography14 nm14 nm
Die size484 mm2484 mm2
Maximum core temperature102 °C92 °C
Maximum case temperature (TCase)no data72 °C
64 bit support++
Windows 11 compatibility++
Unlocked multiplierYesYes

Compatibility

Information on Core i9-7940X and Core i9-9920X 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 configuration11
SocketFCLGA2066FCLGA2066
Power consumption (TDP)165 Watt165 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7940X and Core i9-9920X. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI++
AVX++
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
TSX++
Turbo Boost Max 3.0++
StatusDiscontinuedDiscontinued

Security technologies

Core i9-7940X and Core i9-9920X technologies aimed at improving security, for example, by protecting against hacks.

EDB++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7940X and Core i9-9920X are enumerated here.

VT-d++
VT-x++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7940X and Core i9-9920X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4-2666DDR4-2666
Maximum memory size128 GB128 GB
Max memory channels44
Maximum memory bandwidth85 GB/s85 GB/s
ECC memory support--

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardN/AN/A

Peripherals

Specifications and connection of peripherals supported by Core i9-7940X and Core i9-9920X.

PCIe version3.03.0
PCI Express lanes4444

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


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.

i9-7940X
16.86
+2.9%

Core i9-7940X outperforms Core i9-9920X by 3% in our combined benchmark results.


Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Benchmark coverage: 68%

i9-7940X 25964
+3%
i9-9920X 25216

Core i9-7940X outperforms Core i9-9920X by 3% in Passmark.

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Benchmark coverage: 42%

i9-7940X 1370
i9-9920X 1413
+3.1%

Core i9-9920X outperforms Core i9-7940X by 3% in GeekBench 5 Single-Core.

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Benchmark coverage: 42%

i9-7940X 9923
+5.1%
i9-9920X 9442

Core i9-7940X outperforms Core i9-9920X by 5% in GeekBench 5 Multi-Core.

Gaming performance

Advantages and disadvantages


Performance score 16.86 16.38
Recency 30 May 2017 8 October 2018
Physical cores 14 12
Threads 28 24
Cost $1399 $1189
Boost clock speed 3100 3500
Base clock speed 3100 3500

We couldn't decide between Core i9-7940X and Core i9-9920X. The differences in performance seem too small.


Should you still have questions on choice between Core i9-7940X and Core i9-9920X, ask them in Comments section, and we shall answer.

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Intel Core i9-7940X
Core i9-7940X
Intel Core i9-9920X
Core i9-9920X

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User ratings: view and submit

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4.4 38 votes

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4.4 11 votes

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Questions and comments

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