i9-10900K vs i5-8365U

Aggregate performance score

Core i5-8365U
2019
4 cores / 8 threads, 15 Watt
3.99
Core i9-10900K
2020
10 cores / 20 threads, 125 Watt
14.88
+273%

Core i9-10900K outperforms Core i5-8365U by a whopping 273% based on our aggregate benchmark results.

Primary details

Comparing Core i5-8365U and Core i9-10900K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1448500
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data15.18
Market segmentLaptopDesktop processor
SeriesIntel Core i5no data
Power efficiency24.2610.85
Architecture codenameWhiskey Lake-U (2018−2019)Comet Lake (2020)
Release date16 April 2019 (5 years ago)30 April 2020 (4 years ago)
Launch price (MSRP)$297$488

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i5-8365U and Core i9-10900K 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 cores4 (Quad-Core)10 (Deca-Core)
Threads820
Base clock speed1.6 GHz3.7 GHz
Boost clock speed4.1 GHz5.2 GHz
Bus typeOPIno data
Bus rate4 GT/s8 GT/s
Multiplier16no data
L1 cache256 KB64 KB (per core)
L2 cache1 MB256 KB (per core)
L3 cache6 MB (shared)20 MB (shared)
Chip lithography14 nm14 nm
Die sizeno data206 mm2
Maximum core temperature100 °C100 °C
Maximum case temperature (TCase)no data72 °C
64 bit support++
Windows 11 compatibility++
Unlocked multiplier-+

Compatibility

Information on Core i5-8365U and Core i9-10900K 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
SocketFCBGA1528FCLGA1200
Power consumption (TDP)15 Watt125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8365U and Core i9-10900K. 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++
FMA-+
AVX++
vProno data+
Enhanced SpeedStep (EIST)++
Speed Shift+no data
My WiFi+no data
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
TSX+-
Idle States++
Thermal Monitoring++
Flex Memory Access+no data
SIPP++
Smart Response+no data
Turbo Boost Max 3.0no data+

Security technologies

Core i5-8365U and Core i9-10900K technologies aimed at improving security, for example, by protecting against hacks.

TXT++
EDB++
Secure Key++
MPX+-
Identity Protection++
SGXYes with Intel® MEYes with Intel® ME
OS Guard++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-8365U and Core i9-10900K are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-8365U and Core i9-10900K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR4
Maximum memory size64 GB128 GB
Max memory channels22
Maximum memory bandwidth38.397 GB/s45.8 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel® UHD Graphics for 8th Generation Intel® ProcessorsIntel UHD Graphics 630
Max video memory32 GB64 GB
Quick Sync Video++
Clear Video++
Clear Video HD++
Graphics max frequency1.1 GHz1.2 GHz
InTru 3Dno data+

Graphics interfaces

Available interfaces and connections of Core i5-8365U and Core i9-10900K integrated GPUs.

Number of displays supported33
eDP+no data
DisplayPort+-
HDMI+-
DVI+no data

Graphics image quality

Maximum display resolutions supported by Core i5-8365U and Core i9-10900K integrated GPUs, including resolutions over different interfaces.

4K resolution support++
Max resolution over HDMI 1.44096x2304@24Hz4096 x 2160@30Hz
Max resolution over eDP4096x2304@60Hz4096 x 2304@60Hz
Max resolution over DisplayPort4096x2304@60Hz4096 x 2304@60Hz

Graphics API support

APIs supported by Core i5-8365U and Core i9-10900K integrated GPUs, sometimes API versions are included.

DirectX1212
OpenGL4.54.5

Peripherals

Specifications and connection of peripherals supported by Core i5-8365U and Core i9-10900K.

PCIe version3.03.0
PCI Express lanes1616

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.

i5-8365U 3.99
i9-10900K 14.88
+273%

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.

i5-8365U 6110
i9-10900K 22768
+273%

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.

i5-8365U 638
i9-10900K 1775
+178%

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.

i5-8365U 2419
i9-10900K 9064
+275%

Cinebench 10 32-bit single-core

Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.

i5-8365U 6557
i9-10900K 8127
+23.9%

Cinebench 10 32-bit multi-core

Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.

i5-8365U 16518
i9-10900K 59368
+259%

wPrime 32

wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.

i5-8365U 7.72
i9-10900K 3.58
+116%

Cinebench 11.5 64-bit multi-core

Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported in this version.

i5-8365U 6
i9-10900K 29
+406%

Cinebench 15 64-bit multi-core

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

i5-8365U 579
i9-10900K 2533
+337%

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.

i5-8365U 166
i9-10900K 217
+30.7%

Cinebench 11.5 64-bit single-core

Cinebench R11.5 is an old benchmark 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 loads a single thread with ray tracing to render a glossy room full of crystal spheres and light sources.

i5-8365U 1.91
i9-10900K 2.56
+34%

TrueCrypt AES

TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.

i5-8365U 4.6
i9-10900K 14.6
+217%

x264 encoding pass 2

x264 Pass 2 is a slower variant of x264 video compression that produces a variable bit rate output file, which results in better quality since the higher bit rate is used when it is needed more. Benchmark result is still measured in frames per second.  

i5-8365U 36
i9-10900K 149
+315%

x264 encoding pass 1

x264 version 4.0 is a video encoding benchmark uses MPEG 4 x264 compression method to compress a sample HD (720p) video. Pass 1 is a faster variant that produces a constant bit rate output file. Its result is measured in frames per second, which means how many frames of the source video file were encoded per second.  

i5-8365U 153
i9-10900K 290
+89.2%

WinRAR 4.0

WinRAR 4.0 is an outdated version of a popular file archiver. It contains an internal speed test, using 'Best' setting of RAR compression on large chunks of randomly generated data. Its results are measured in kilobytes per second.

i5-8365U 3173
i9-10900K 9739
+207%

Blender(-)

i5-8365U 825
+361%
i9-10900K 179

7-Zip Single

i5-8365U 4346
i9-10900K 5811
+33.7%

7-Zip

i5-8365U 17293
i9-10900K 69987
+305%

Gaming performance

Pros & cons summary


Performance score 3.99 14.88
Recency 16 April 2019 30 April 2020
Physical cores 4 10
Threads 8 20
Power consumption (TDP) 15 Watt 125 Watt

i5-8365U has 733.3% lower power consumption.

i9-10900K, on the other hand, has a 272.9% higher aggregate performance score, an age advantage of 1 year, and 150% more physical cores and 150% more threads.

The Core i9-10900K is our recommended choice as it beats the Core i5-8365U in performance tests.

Be aware that Core i5-8365U is a notebook processor while Core i9-10900K is a desktop one.


Should you still have questions on choice between Core i5-8365U and Core i9-10900K, ask them in Comments section, and we shall answer.

Vote for your favorite

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


Intel Core i5-8365U
Core i5-8365U
Intel Core i9-10900K
Core i9-10900K

Similar processor comparisons

We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.

Community ratings

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


3.7 367 votes

Rate Core i5-8365U on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
3.6 1222 votes

Rate Core i9-10900K on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Core i5-8365U or Core i9-10900K, agree or disagree with our judgements, or report an error or mismatch.