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Intel Core i5-8259U

The Intel Core i5-8259U is a quad-core SoC for notebooks based on the Coffee Lake architecture and was announced in April 2018. Compared to its predecessor Core i5-7267U, the CPU is now a quad-core with Hyperthreading support for the execution of up to 8 threads simultaneously. The base frequency is 2.3 GHz, but the Turbo goes all the way up to 3.8 GHz. It is also equipped with an Intel Iris Plus Graphics 655 GPU with 128 MB eDRAM, a dual-channel memory controller (DDR4) as well as VP9 and H.265 video decoding as well as encoding. The chip is still manufactured in a 14nm process with FinFET transistors.

Compared to faster Core i5 and i7 models with eDRAM and 28 Watts, the i5-8259U only features 6 MB smart cache and the slowest clock of the Iris Plus GPU.

Architecture

Intel basically uses the same micro architecture compared to Kaby Lake, so the per-MHz performance does not differ. The manufacturer only reworked the Speed Shift technology for faster dynamic adjustments of voltages and clocks, and the improved 14nm process allows much higher frequencies combined with better efficiency than before.

Performance

Considering the clocks of the Core i5-8259U, its performance should be between the 15W models Core i5-8350U and Core i7-8550U. The i5-8259U should still be faster than the i7-8550U in practice thanks to the increased TDP, especially during sustained workloads.

Graphics

The integrated Intel Iris Plus 655 Graphics is the GT3e model of the Kaby Lake GPU (Intel Gen. 9.5). It has 48 Execution Units running at 300-1050 MHz (slowest clock of the 655, the fastest is 1200 MHz in combination with the i7-8559U) and the performance is comparable to a GeForce 930M or 940MX thanks to fast eDRAM cache. However, there aren't any significant improvements compared to the old Iris Plus 650, so modern games can often not be played smoothly or only at the lowest or medium settings, respectively.

Contrary to Skylake, Kaby lake now also supports H.265/HEVC Main 10 with a 10-bit color depth as well as Google's VP9 codec. The dual-core Kaby Lake processors announced in January should also support HDCP 2.2.

Power Consumption

The chip is manufactured in an improved 14nm process with FinFET transistors, which improves the efficiency even further. Intel specifies the TDP with 28 Watts, which can be reduced to 23 Watts (cTDP Down) depending on the usage scenario. The TDP is pretty high compared to the common 15-Watt TDP for quad-core processors, but allows a better utilization of CPU and GPU Turbo.

SeriesIntel Coffee Lake
CodenameCoffee Lake-U
Series: Coffee Lake Coffee Lake-U
Intel Core i7-8559U compare2700 - 4500 MHz4 / 88 MB
Intel Core i7-8557U compare1700 - 4500 MHz4 / 88 MB
Intel Core i5-8269U compare2600 - 4200 MHz4 / 86 MB
Intel Core i5-8279U compare2400 - 4100 MHz4 / 86 MB
» Intel Core i5-8259U2300 - 3800 MHz4 / 86 MB
Intel Core i5-8257U compare1400 - 3900 MHz4 / 86 MB
Intel Core i3-8109U compare3000 - 3600 MHz2 / 44 MB
Clock Rate2300 - 3800 MHz
Level 1 Cache256 KB
Level 2 Cache1 MB
Level 3 Cache6 MB
Number of Cores / Threads4 / 8
Power Consumption (TDP = Thermal Design Power)28 Watt
Manufacturing Technology14 nm
Max. Temperature100 °C
SocketFCBGA1528
FeaturesDual-Channel DDR4 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI, Intel SSE4.1, Intel SSE 4.2
GPUIntel Iris Plus Graphics 655 (300 - 1050 MHz)
64 Bit64 Bit support
Announcement Date04/03/2018
Product Link (external)Intel Coffee Lake i5-8259U

Benchmarks

Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 608     avg: 648     median: 647.5 (15%)     max: 687 Points
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

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Reviews for the Intel Coffee Lake i5-8259U processor

Apple MacBook Pro 13 2018 Touchbar i5 (Intel Iris Plus Graphics 655, 13.3")
» Apple MacBook Pro 13 2018 (Touch Bar, i5) Laptop Review - Review
» Apple MacBook Pro 13 2018 Touchbar i5 - External Review

» Mobile CPU Comparison
Comparison of all mobile CPU series

» Mobile Processors - Benchmarklist
Benchmarklist of all known CPUs that are used in laptops (desktop and laptop CPUs)

Other CPUs of the series Coffee Lake

» Intel Core i9-9900KS
   8x 4 GHz - 5 GHz
» Intel Core i9-9900K
   8x 3.6 GHz - 5 GHz
» Intel Core i9-9980HK
   8x 2.4 GHz - 5 GHz
» Intel Core i7-9700K
   8x 3.6 GHz - 4.9 GHz
» Intel Core i9-9880H
   8x 2.3 GHz - 4.8 GHz
» Intel Core i7-8086K
   6x 3.7 GHz - 5 GHz
» Intel Core i7-8700K
   6x 3.7 GHz - 4.7 GHz
» Intel Core i7-9700
   8x 3 GHz - 4.7 GHz
» Intel Core i9-8950HK
   6x 2.9 GHz - 4.8 GHz
» Intel Xeon E-2186M
   6x 2.9 GHz - 4.8 GHz
» Intel Xeon E-2276M
   6x 2.8 GHz - 4.7 GHz
» Intel Xeon E-2176G
   6x 3.7 GHz - 4.7 GHz
» Intel Core i7-8700
   6x 3.2 GHz - 4.6 GHz
» Intel Core i5-9600K
   6x 3.7 GHz - 4.6 GHz
» Intel Core i9-9900T
   8x 2.1 GHz - 4.4 GHz
» Intel Core i7-9850H
   6x 2.6 GHz - 4.6 GHz
» Intel Core i7-9750H
   6x 2.6 GHz - 4.5 GHz
» Intel Xeon E-2176M
   6x 2.7 GHz - 4.4 GHz
» Intel Core i7-8850H
   6x 2.6 GHz - 4.3 GHz
» Intel Core i5-8600K
   6x 3.6 GHz - 4.3 GHz
» Intel Core i5-8500
   6x 3 GHz - 4.1 GHz
» Intel Core i7-8750H
   6x 2.2 GHz - 4.1 GHz
» Intel Core i5-8400
   6x 2.8 GHz - 4 GHz
» Intel Core i5-8500T
   6x 2.1 GHz - 3.5 GHz
» Intel Core i5-9400H
   4x 2.5 GHz - 4.3 GHz
» Intel Core i5-9300HF
   4x 2.4 GHz - 4.1 GHz
» Intel Core i5-9300H
   4x 2.4 GHz - 4.1 GHz
» Intel Core i5-8400H
   4x 2.5 GHz - 4.2 GHz
» Intel Core i7-8559U
   4x 2.7 GHz - 4.5 GHz
» Intel Core i5-8300H
   4x 2.3 GHz - 4 GHz
» Intel Core i5-9400F
   6x 2.9 GHz - 4.1 GHz
» Intel Core i3-9100F
   4x 3.6 GHz - 4.2 GHz
» Intel Core i7-8557U
   4x 1.7 GHz - 4.5 GHz
» Intel Core i5-8269U
   4x 2.6 GHz - 4.2 GHz
» Intel Core i5-8279U
   4x 2.4 GHz - 4.1 GHz
» Intel Core i5-8259U
   4x 2.3 GHz - 3.8 GHz
» Intel Core i5-8257U
   4x 1.4 GHz - 3.9 GHz
» Intel Core i3-8100H
   4x 3 GHz
» Intel Core i3-8109U
   2x 3 GHz - 3.6 GHz

Surrounding CPUs

+ Intel Core i7-6820HQ
   4x 2.7 GHz - 3.6 GHz
+ Intel Core i7-6770HQ
   4x 2.6 GHz - 3.5 GHz
+ Intel Core i7-1065G7
   4x 1.3 GHz - 3.9 GHz
+ Intel Core i7-1160G7
   4x 2.1 GHz - 4.4 GHz
+ AMD Ryzen 7 3780U
   4x 2.3 GHz - 4 GHz
» Intel Core i5-8259U
   4x 2.3 GHz - 3.8 GHz
- Intel Core i5-8257U
   4x 1.4 GHz - 3.9 GHz
- Intel Core i7-4900MQ
   4x 2.8 GHz - 3.8 GHz
- Intel Core i7-10610U
   4x 1.8 GHz - 4.9 GHz
- Intel Core i7-10510U
   4x 1.8 GHz - 4.8 GHz
- Intel Core i7-4960HQ
   4x 2.6 GHz - 3.8 GHz
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> Notebook / Laptop Reviews and News > Benchmarks / Tech > Notebook Processors > Intel Core i5-8259U SoC - Benchmarks and Specs
Klaus Hinum (Update: 2018-07-17)