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Intel Core i7-8559U

The Intel Core i7-8559U is a quad-core SoC for notebooks based on the Coffee Lake architecture and was announced in April 2018. Compared to its predecessor Core i7-7567U, the CPU is now a quad-core with Hyperthreading support for the execution of up to 8 threads simultaneously. The base frequency is 2.7 GHz, but the Turbo goes all the way up to 4.5 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 models with eDRAM and 28 Watts, the i5-8559U features 8 MB smart cache and the fastest 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

Clocked at up to 4.5 GHz, the Core i7-8559U is currently the fastest quad core ULV from Intel. Whether these speeds can be maintained in practice depends on the cooling capabilities of the laptop, but the performance should be above the Core i7-8650U due to the increased TDPConsidering the clocks of the Core i7-8559U, 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 Coffee Lake GPU (Intel Gen. 9.5). It has 48 Execution Units running at 300-1200 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 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 Core i7
CodenameCoffee Lake
Series: Core i7 Coffee Lake
Intel Core i7-9850H (compare)2600 - 4600 MHz6 / 1212 MB
Intel Core i7-9750H (compare)2600 - 4500 MHz6 / 1212 MB
Intel Core i7-8850H (compare)2600 - 4300 MHz6 / 129 MB
Intel Core i7-8750H (compare)2200 - 4100 MHz6 / 129 MB
» Intel Core i7-8559U2700 - 4500 MHz4 / 88 MB
Intel Core i7-8557U (compare)1700 - 4500 MHz4 / 88 MB
Clock Rate2700 - 4500 MHz
Level 1 Cache256 KB
Level 2 Cache1 MB
Level 3 Cache8 MB
Number of Cores / Threads4 / 8
Max. 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 - 1200 MHz)
64 Bit64 Bit support
Announcement Date04/03/2018
Product Link (external)Intel Core i7 8559U

Benchmarks

Cinebench R15 - CPU Multi 64Bit
min: 672     avg: 674.5     median: 674 (15%)     max: 677 Points
Cinebench R15 - CPU Single 64Bit
min: 180     avg: 184     median: 184 (84%)     max: 188 Points
7-Zip 18.03 - 7z b 4
min: 22033     avg: 26301.5     median: 26301 (25%)     max: 30570 MIPS
7-Zip 18.03 - 7z b 4 -mmt1
min: 4826     avg: 5498.5     median: 5498 (79%)     max: 6171 MIPS
HWBOT x265 Benchmark v2.2 - 4k Preset
5.7 fps (19%)
Blender 2.79 *
min: 650     avg: 666     median: 666 (7%)     max: 682 Seconds
3DMark 11 - Performance Physics 1280x720
9162 points (47%)
3DMark - Fire Strike Physics 1920x1080
10418 Points (32%)
Geekbench 4.4 - 64 Bit Single-Core Score
min: 5372     avg: 5383.5     median: 5383 (85%)     max: 5395 Points
Geekbench 4.4 - 64 Bit Multi-Core Score
min: 17702     avg: 18095     median: 18095 (31%)     max: 18488 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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