5 120U vs i5-8400

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Aggregate performance score

Core i5-8400
2017
6 cores / 6 threads, 65 Watt
5.81
Core 5 120U
2024
10 cores / 12 threads, 15 Watt
10.40
+79%

Core 5 120U outperforms Core i5-8400 by an impressive 79% based on our aggregate benchmark results.

Primary details

Comparing Core i5-8400 and Core 5 120U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1125750
Place by popularity63not in top-100
Cost-effectiveness evaluation5.02no data
Market segmentDesktop processorLaptop
SeriesIntel Core i5Raptor Lake-U
Power efficiency8.4165.27
Architecture codenameCoffee Lake-S (2017−2018)Raptor Lake-U Refresh (2024)
Release date5 October 2017 (7 years ago)8 January 2024 (less than a year ago)
Launch price (MSRP)$182no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i5-8400 and Core 5 120U 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 cores6 (Hexa-Core)10 (Deca-Core)
Threads612
Base clock speed2.8 GHz1.4 GHz
Boost clock speed4 GHz5 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/s55 MHz
Multiplier28no data
L1 cache64K (per core)80 KB (per core)
L2 cache256K (per core)1.25 MB (per core)
L3 cache9 MB (shared)12 MB (shared)
Chip lithography14 nmIntel 7 nm
Die size149 mm2no data
Maximum core temperature100 °C100 °C
Maximum case temperature (TCase)72 °Cno data
64 bit support++
Windows 11 compatibility+no data

Compatibility

Information on Core i5-8400 and Core 5 120U 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
SocketFCLGA1151FCBGA1744
Power consumption (TDP)65 Watt15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8400 and Core 5 120U. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI++
AVX++
vPro++
Enhanced SpeedStep (EIST)++
Speed Shiftno data+
Turbo Boost Technology2.0no data
Hyper-Threading Technology-+
TSX-+
Idle States+no data
Thermal Monitoring++
Flex Memory Accessno data+
Deep Learning Boost-+

Security technologies

Core i5-8400 and Core 5 120U technologies aimed at improving security, for example, by protecting against hacks.

TXT-+
EDB++
Secure Key++
MPX+-
Identity Protection+-
SGXYes with Intel® MEno data
OS Guard++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-8400 and Core 5 120U are enumerated here.

AMD-V+-
VT-d++
VT-x++
EPT++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-8400 and Core 5 120U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3, DDR4DDR5-5200, DDR4-3200, LPDDR4x-4267
Maximum memory size128 GB96 GB
Max memory channels22
Maximum memory bandwidth42.671 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel UHD Graphics 630Intel® Graphics
Max video memory64 GBno data
Quick Sync Video++
Clear Video+no data
Clear Video HD+no data
Graphics max frequency1.05 GHz1.25 GHz
Execution Unitsno data80
InTru 3D+no data

Graphics interfaces

Available interfaces and connections of Core i5-8400 and Core 5 120U integrated GPUs.

Number of displays supported34

Graphics image quality

Maximum display resolutions supported by Core i5-8400 and Core 5 120U integrated GPUs, including resolutions over different interfaces.

4K resolution support+no data
Max resolution over HDMI 1.44096x2304@24Hz4096 x 2304 @ 60Hz
Max resolution over eDP4096x2304@60Hz4096 x 2304 @ 120Hz
Max resolution over DisplayPort4096x2304@60Hz7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core i5-8400 and Core 5 120U integrated GPUs, sometimes API versions are included.

DirectX1212.1
OpenGL4.54.6

Peripherals

Specifications and connection of peripherals supported by Core i5-8400 and Core 5 120U.

PCIe version3.04.0
PCI Express lanes168

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.

i5-8400 5.81
5 120U 10.40
+79%

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.

i5-8400 9234
5 120U 16516
+78.9%

Cinebench 15 64-bit multi-core

Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.

i5-8400 941
5 120U 1432
+52.2%

Cinebench 15 64-bit single-core

Cinebench R15 (standing for Release 15) is a benchmark made by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version (sometimes called Single-Thread) only uses a single processor thread to render a room full of reflective spheres and light sources.

i5-8400 170
5 120U 257
+51.6%

Gaming performance

Pros & cons summary


Performance score 5.81 10.40
Recency 5 October 2017 8 January 2024
Physical cores 6 10
Threads 6 12
Power consumption (TDP) 65 Watt 15 Watt

5 120U has a 79% higher aggregate performance score, an age advantage of 6 years, 66.7% more physical cores and 100% more threads, and 333.3% lower power consumption.

The Core 5 120U is our recommended choice as it beats the Core i5-8400 in performance tests.

Note that Core i5-8400 is a desktop processor while Core 5 120U is a notebook one.


Should you still have questions on choice between Core i5-8400 and Core 5 120U, ask them in Comments section, and we shall answer.

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Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


Intel Core i5-8400
Core i5-8400
Intel Core 5 120U
Core 5 120U

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Community ratings

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Questions & comments

Here you can ask a question about Core i5-8400 or Core 5 120U, agree or disagree with our judgements, or report an error or mismatch.