Intel Core i3-8109U vs Intel Core i5-8259U

Intel Core i3-8109U

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The Intel Core i3-8109U is a dual-core SoC for notebooks based on the Coffee Lake architecture and was announced in April 2018. Compared to its predecessor Core i3-7167U, the CPU now supports Turbo boost with up to 3.6 GHz. Thanks to Hyperthreading the CPU can execute up to 4 threads simultaneously. It is also equipped with an Intel Iris Plus Graphics 655 GPU with 128 MB eDRAM (but with 300 - 1050 MHz it is the slowest Iris Plus), 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 (3rd generation) with FinFET transistors.

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

Thanks to the Turbo Boost, the processor performance should be a bit above the old Core i7-7500U (max. 3.5 GHz, 15 Watt). Therefore the Core i3-8109U should be fine for most applications. Some games however already need four real cores for optimal performance (paired with a dedicated GPU e.g.).

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  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 (14nm++, 3rd generation of 14nm) 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.

Intel Core i5-8259U

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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.

Intel Core i3-8109UIntel Core i5-8259U
Intel Coffee LakeIntel Coffee Lake
Coffee Lake-UCoffee Lake-U
: 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 i3-8109U3000 - 3600 MHz2 / 44 MB
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 i3-8109U3000 - 3600 MHz2 / 44 MB
3000 - 3600 MHz2300 - 3800 MHz
128 KB256 KB
512 KB1 MB
4 MB6 MB
2 / 44 / 8
28 28
14 14
100 °C100 °C
FCBGA1528FCBGA1528
Dual-Channel DDR4 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI, Intel SSE4.1, Intel SSE 4.2Dual-Channel DDR4 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI, Intel SSE4.1, Intel SSE 4.2
iGPUIntel Iris Plus Graphics 655 (300 - 1050 MHz)Intel Iris Plus Graphics 655 (300 - 1050 MHz)
Intel Coffee Lake i3-8109UIntel Coffee Lake i5-8259U

Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
381 Points (9%)
min: 608     avg: 648     median: 647.5 (15%)     max: 687 Points
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
153 Points (67%)
154 Points (67%)
3DMark - 3DMark Time Spy CPU
2336 Points (16%)
2909 Points (20%)
Geekbench 4.4 - Geekbench 4.1+ 64 Bit Single-Core
4540 (68%)
4540 (68%)
Geekbench 4.4 - Geekbench 4.1+ 64 Bit Multi-Core
8974 (16%)
8974 (16%)

Average Benchmarks Intel Core i3-8109U → 100% n=5

Average Benchmarks Intel Core i5-8259U → 119% n=5

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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Redaktion, 2017-09- 8 (Update: 2017-09-11)