i7-8665U vs i5-8259U

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Aggregate performance score

Core i5-8259U
2018
4 cores / 8 threads, 28 Watt
4.96
+26.2%
Core i7-8665U
2018
4 cores / 8 threads, 15 Watt
3.93

Core i5-8259U outperforms Core i7-8665U by a significant 26% based on our aggregate benchmark results.

Primary details

Comparing Core i5-8259U and Core i7-8665U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking12351445
Place by popularitynot in top-100not in top-100
Market segmentLaptopLaptop
SeriesIntel Core i5Intel Core i7
Power efficiency16.7624.79
Architecture codenameCoffee Lake-U (2018−2019)Whiskey Lake-U (2018−2019)
Release date5 April 2018 (6 years ago)1 October 2018 (6 years ago)
Launch price (MSRP)$320$409

Detailed specifications

Core i5-8259U and Core i7-8665U 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)4 (Quad-Core)
Threads88
Base clock speed2.3 GHz1.9 GHz
Boost clock speed3.8 GHz4.8 GHz
Bus typeOPIOPI
Bus rate4 GT/s4 GT/s
Multiplier2319
L1 cache64K (per core)64 KB (per core)
L2 cache256K (per core)256 KB (per core)
L3 cache6 MB (shared)8 MB (shared)
Chip lithography14 nm14 nm
Die size126 mm2no data
Maximum core temperature100 °C100 °C
Maximum case temperature (TCase)72 °Cno data
64 bit support++
Windows 11 compatibility++

Compatibility

Information on Core i5-8259U and Core i7-8665U 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)
SocketFCBGA1528FCBGA1528
Power consumption (TDP)28 Watt15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8259U and Core i7-8665U. 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++
Enhanced SpeedStep (EIST)++
eDRAM128 MBno data
Speed Shift++
My WiFi++
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
TSX-+
Idle States++
Thermal Monitoring++
Flex Memory Access++
SIPP-+
Smart Responseno data+

Security technologies

Core i5-8259U and Core i7-8665U 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 i5-8259U and Core i7-8665U are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-8259U and Core i7-8665U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR4
Maximum memory size32 GB64 GB
Max memory channels22
Maximum memory bandwidth38.397 GB/s38.397 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
Intel Iris Plus Graphics 655Intel UHD Graphics for 8th Generation Intel Processors
Max video memory32 GB32 GB
Quick Sync Video++
Clear Video++
Clear Video HD++
Graphics max frequency1.05 GHz1.15 GHz
InTru 3D+no data

Graphics interfaces

Available interfaces and connections of Core i5-8259U and Core i7-8665U integrated GPUs.

Number of displays supported33
eDP++
DisplayPort++
HDMI++
DVI++

Graphics image quality

Maximum display resolutions supported by Core i5-8259U and Core i7-8665U integrated GPUs, including resolutions over different interfaces.

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

Graphics API support

APIs supported by Core i5-8259U and Core i7-8665U integrated GPUs, sometimes API versions are included.

DirectX1212
OpenGL4.54.5

Peripherals

Specifications and connection of peripherals supported by Core i5-8259U and Core i7-8665U.

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.

i5-8259U 4.96
+26.2%
i7-8665U 3.93

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.

i5-8259U 7873
+26%
i7-8665U 6247

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.

i5-8259U 1238
+61.8%
i7-8665U 765

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.

i5-8259U 4099
+69%
i7-8665U 2425

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.

i5-8259U 5706
i7-8665U 6872
+20.4%

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.

i5-8259U 21869
+18.7%
i7-8665U 18427

3DMark06 CPU

3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.

i5-8259U 7916
+24.4%
i7-8665U 6365

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.

i5-8259U 7.48
+33.4%
i7-8665U 9.98

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.

i5-8259U 7
+44.9%
i7-8665U 5

Cinebench 15 64-bit multi-core

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

i5-8259U 615
i7-8665U 670
+8.9%

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.

i5-8259U 149
i7-8665U 180
+21.1%

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.

i5-8259U 1.67
i7-8665U 1.67

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.

i5-8259U 4.1
+57.7%
i7-8665U 2.6

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.

i5-8259U 5348
+56.5%
i7-8665U 3418

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.  

i5-8259U 40
+23.4%
i7-8665U 32

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.  

i5-8259U 165
+18.8%
i7-8665U 139

Geekbench 5.5 Multi-Core

i5-8259U 3607
+35%
i7-8665U 2671

Blender(-)

i5-8259U 730
i7-8665U 755
+3.4%

Geekbench 5.5 Single-Core

i5-8259U 951
i7-8665U 1039
+9.3%

7-Zip Single

i5-8259U 3976
i7-8665U 4706
+18.4%

7-Zip

i5-8259U 19105
+4.4%
i7-8665U 18298

Gaming performance

Pros & cons summary


Performance score 4.96 3.93
Integrated graphics card 4.49 5.58
Recency 5 April 2018 1 October 2018
Power consumption (TDP) 28 Watt 15 Watt

i5-8259U has a 26.2% higher aggregate performance score.

i7-8665U, on the other hand, has 24.3% faster integrated GPU, an age advantage of 5 months, and 86.7% lower power consumption.

The Core i5-8259U is our recommended choice as it beats the Core i7-8665U in performance tests.


Should you still have questions on choice between Core i5-8259U and Core i7-8665U, ask them in Comments section, and we shall answer.

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Intel Core i5-8259U
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Community ratings

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Questions & comments

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