i5-14400F vs i9-9940X

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Aggregate performance score

Core i9-9940X
2018
14 cores / 28 threads, 165 Watt
17.63
+8.4%
Core i5-14400F
2024
10 cores / 16 threads, 65 Watt
16.26

Core i9-9940X outperforms Core i5-14400F by a small 8% based on our aggregate benchmark results.

Primary details

Comparing Core i9-9940X and Core i5-14400F processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking355412
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation5.2960.43
Market segmentDesktop processorDesktop processor
SeriesIntel Core i9no data
Power efficiency10.1123.66
Architecture codenameSkylake (server) (2017−2018)Raptor Lake-R (2023−2024)
Release date19 October 2018 (6 years ago)8 January 2024 (less than a year ago)
Launch price (MSRP)$1,387$196

Cost-effectiveness evaluation

Performance per price, higher is better.

i5-14400F has 1042% better value for money than i9-9940X.

Detailed specifications

Core i9-9940X and Core i5-14400F 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 speed3.3 GHz2.5 GHz
Boost clock speed4.5 GHz4.7 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
Multiplier33no 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 nm10 nm
Die size484 mm2215 mm2
Maximum core temperature88 °Cno data
64 bit support++
Windows 11 compatibility++
Unlocked multiplier+-

Compatibility

Information on Core i9-9940X and Core i5-14400F 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
SocketFCLGA20661700
Power consumption (TDP)165 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9940X and Core i5-14400F. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512no data
AES-NI++
AVX++
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.0no data
Hyper-Threading Technology+no data
TSX++
Turbo Boost Max 3.0+no data

Security technologies

Core i9-9940X and Core i5-14400F technologies aimed at improving security, for example, by protecting against hacks.

TXTno data+
EDB+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9940X and Core i5-14400F are enumerated here.

VT-d++
VT-x++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9940X and Core i5-14400F. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4-2666DDR4, DDR5
Maximum memory size128 GBno data
Max memory channels4no data
Maximum memory bandwidth85.33 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardN/AN/A

Peripherals

Specifications and connection of peripherals supported by Core i9-9940X and Core i5-14400F.

PCIe version3.05.0
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.

i9-9940X 17.63
+8.4%
i5-14400F 16.26

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.

i9-9940X 28012
+8.4%
i5-14400F 25832

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.

i9-9940X 1459
i5-14400F 2342
+60.5%

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.

i9-9940X 10316
i5-14400F 11420
+10.7%

Gaming performance

Pros & cons summary


Performance score 17.63 16.26
Recency 19 October 2018 8 January 2024
Physical cores 14 10
Threads 28 16
Chip lithography 14 nm 10 nm
Power consumption (TDP) 165 Watt 65 Watt

i9-9940X has a 8.4% higher aggregate performance score, and 40% more physical cores and 75% more threads.

i5-14400F, on the other hand, has an age advantage of 5 years, a 40% more advanced lithography process, and 153.8% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Core i9-9940X and Core i5-14400F.


Should you still have questions on choice between Core i9-9940X and Core i5-14400F, ask them in Comments section, and we shall answer.

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Intel Core i9-9940X
Core i9-9940X
Intel Core i5-14400F
Core i5-14400F

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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 i9-9940X or Core i5-14400F, agree or disagree with our judgements, or report an error or mismatch.