i9-7920X vs i9-7940X

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Aggregate performance score

Core i9-7940X
2017
14 cores / 28 threads, 165 Watt
16.34
+9.7%
Core i9-7920X
2017
12 cores / 24 threads, 140 Watt
14.89

Core i9-7940X outperforms Core i9-7920X by a moderate 10% based on our aggregate benchmark results.

Primary details

Comparing Core i9-7940X and Core i9-7920X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking408476
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation3.303.30
Market segmentDesktop processorDesktop processor
SeriesIntel Core i9Intel Core i9
Power efficiency9.3710.07
Architecture codenameSkylake (server) (2017−2018)Skylake (server) (2017−2018)
Release date1 September 2017 (7 years ago)10 September 2017 (7 years ago)
Launch price (MSRP)$1,399$1,199

Cost-effectiveness evaluation

Performance per price, higher is better.

i9-7940X and i9-7920X have a nearly equal value for money.

Detailed specifications

Core i9-7940X and Core i9-7920X 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 GHz2.9 GHz
Boost clock speed4.4 GHz4.4 GHz
Bus typeDMI 3.0DMI 3.0
Bus rate4 × 8 GT/s4 × 8 GT/s
L1 cache64 KB (per core)64 KB (per core)
L2 cache1 MB (per core)1 MB (per core)
L3 cache19.25 MB (shared)16.5 MB (shared)
Chip lithography14 nm14 nm
Die size484 mm2484 mm2
Maximum core temperature102 °C95 °C
Maximum case temperature (TCase)no data72 °C
64 bit support++
Windows 11 compatibility++
Unlocked multiplier++

Compatibility

Information on Core i9-7940X and Core i9-7920X 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 configuration1 (Uniprocessor)1 (Uniprocessor)
SocketFCLGA2066FCLGA2066
Power consumption (TDP)165 Watt140 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7940X and Core i9-7920X. 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++

Security technologies

Core i9-7940X and Core i9-7920X 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 i9-7920X are enumerated here.

VT-d++
VT-x++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7940X and Core i9-7920X. 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 bandwidth85.33 GB/s85.33 GB/s

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 i9-7920X.

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 16.34
+9.7%
i9-7920X 14.89

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.

i9-7940X 25963
+9.8%
i9-7920X 23653

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.

i9-7940X 1453
+5.7%
i9-7920X 1374

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.

i9-7940X 10604
+15%
i9-7920X 9219

Gaming performance

Pros & cons summary


Performance score 16.34 14.89
Physical cores 14 12
Threads 28 24
Power consumption (TDP) 165 Watt 140 Watt

i9-7940X has a 9.7% higher aggregate performance score, and 16.7% more physical cores and 16.7% more threads.

i9-7920X, on the other hand, has 17.9% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Core i9-7940X and Core i9-7920X.


Should you still have questions on choice between Core i9-7940X and Core i9-7920X, ask them in Comments section, and we shall answer.

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Intel Core i9-7940X
Core i9-7940X
Intel Core i9-7920X
Core i9-7920X

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


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Questions & comments

Here you can ask a question about Core i9-7940X or Core i9-7920X, agree or disagree with our judgements, or report an error or mismatch.