i5-14400 vs i9-7940X

VS

Aggregate performance score

Core i9-7940X
2017
14 cores / 28 threads, 165 Watt
16.34
+1.7%
Core i5-14400
2024
10 cores / 16 threads, 65 Watt
16.06

Core i9-7940X outperforms Core i5-14400 by a minimal 2% based on our aggregate benchmark results.

Primary details

Comparing Core i9-7940X and Core i5-14400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking408422
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation3.3052.75
Market segmentDesktop processorDesktop processor
SeriesIntel Core i9no data
Power efficiency9.3723.37
Architecture codenameSkylake (server) (2017−2018)Raptor Lake-R (2023−2024)
Release date1 September 2017 (7 years ago)8 January 2024 (less than a year ago)
Launch price (MSRP)$1,399$221

Cost-effectiveness evaluation

Performance per price, higher is better.

i5-14400 has 1498% better value for money than i9-7940X.

Detailed specifications

Core i9-7940X and Core i5-14400 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)10 (Deca-Core)
Threads2816
Base clock speed3.1 GHz2.5 GHz
Boost clock speed4.4 GHz4.7 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
L1 cache64 KB (per core)80 KB (per core)
L2 cache1 MB (per core)1.25 MB (per core)
L3 cache19.25 MB (shared)20 MB (shared)
Chip lithography14 nmIntel 7 nm
Die size484 mm2215 mm2
Maximum core temperature102 °C100 °C
64 bit support++
Windows 11 compatibility++
Unlocked multiplier+-

Compatibility

Information on Core i9-7940X and Core i5-14400 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
SocketFCLGA2066FCLGA1700
Power consumption (TDP)165 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7940X and Core i5-14400. 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
AES-NI++
AVX++
Enhanced SpeedStep (EIST)++
Speed Shiftno data+
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
TSX++
Idle Statesno data+
Thermal Monitoring-+
Turbo Boost Max 3.0+no data
Deep Learning Boost-+

Security technologies

Core i9-7940X and Core i5-14400 technologies aimed at improving security, for example, by protecting against hacks.

TXTno data+
EDB++
Secure Keyno data+
OS Guardno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7940X and Core i5-14400 are enumerated here.

VT-d++
VT-x++
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7940X and Core i5-14400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4-2666DDR5-4800, DDR4-3200
Maximum memory size128 GB192 GB
Max memory channels42
Maximum memory bandwidth85.33 GB/s76.8 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardN/AIntel UHD Graphics 730
Quick Sync Video-+
Clear Video HDno data+
Graphics max frequencyno data1.55 GHz
Execution Unitsno data24

Graphics interfaces

Available interfaces and connections of Core i9-7940X and Core i5-14400 integrated GPUs.

Number of displays supportedno data4

Graphics image quality

Maximum display resolutions supported by Core i9-7940X and Core i5-14400 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4no data4096 x 2160 @ 60Hz
Max resolution over eDPno data5120 x 3200 @ 120Hz
Max resolution over DisplayPortno data7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core i9-7940X and Core i5-14400 integrated GPUs, sometimes API versions are included.

DirectXno data12
OpenGLno data4.5

Peripherals

Specifications and connection of peripherals supported by Core i9-7940X and Core i5-14400.

PCIe version3.05.0 and 4.0
PCI Express lanes4416

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
+1.7%
i5-14400 16.06

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
+1.8%
i5-14400 25512

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
i5-14400 2389
+64.4%

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
i5-14400 11088
+4.6%

Gaming performance

Pros & cons summary


Performance score 16.34 16.06
Recency 1 September 2017 8 January 2024
Physical cores 14 10
Threads 28 16
Power consumption (TDP) 165 Watt 65 Watt

i9-7940X has a 1.7% higher aggregate performance score, and 40% more physical cores and 75% more threads.

i5-14400, on the other hand, has an age advantage of 6 years, and 153.8% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Core i9-7940X and Core i5-14400.


Should you still have questions on choice between Core i9-7940X and Core i5-14400, ask them in Comments section, and we shall answer.

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Intel Core i9-7940X
Core i9-7940X
Intel Core i5-14400
Core i5-14400

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Community ratings

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


4.4 43 votes

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Questions & comments

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