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Intel Core i5-8257U

The Intel Core i5-8257U is a quad-core SoC for notebooks based on the Coffee Lake architecture that was announced in the new entry level MacBook Pro 13 in mid 2019. Compared to its predecessor, the CPU is now a quad-core with Hyperthreading support for the execution of up to 8 threads simultaneously. The base frequency is only 1.4 GHz, but the Turbo goes all the way up to 3.9 GHz. It is also equipped with an Intel Iris Plus Graphics 645 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 i7-8557U model with eDRAM and 15 Watts, the i5-8257U 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

Thanks to the relative high Turbo Boost clock, the single thread performance should be very good, but still behind the faster i7 model. The short burst all core performance is clearly better compared to the old dual core predecessors thanks to the additional cores. In sustained workloads, the performance is usually limited by the TDP and cooling. In these workloads the difference to the Core i7 should be also smaller.

Graphics

The integrated Intel Iris Plus 645 Graphics is the GT3e model of the Coffee 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 with FinFET transistors, which improves the efficiency even further. Intel specifies the TDP with 15 Watts and therefore suited for thin and light laptops.

SeriesIntel Coffee Lake
CodenameCoffee Lake-U
Series: Coffee Lake Coffee Lake-U
Intel Core i7-8559U compare2.7 - 4.5 GHz4 / 88 MB
Intel Core i7-8557U compare1.7 - 4.5 GHz4 / 88 MB
Intel Core i5-8269U compare2.6 - 4.2 GHz4 / 86 MB
Intel Core i5-8279U compare2.4 - 4.1 GHz4 / 86 MB
Intel Core i5-8259U compare2.3 - 3.8 GHz4 / 86 MB
» Intel Core i5-8257U1.4 - 3.9 GHz4 / 86 MB
Intel Core i3-8109U compare3 - 3.6 GHz2 / 44 MB
Clock Rate1400 - 3900 MHz
Level 1 Cache256 KB
Level 2 Cache1 MB
Level 3 Cache6 MB
Number of Cores / Threads4 / 8
Power Consumption (TDP = Thermal Design Power)15 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 645 (300 - 1050 MHz)
64 Bit64 Bit support
Architecturex86
Announcement Date07/10/2019
Product Link (external)Intel Coffee Lake i5-8257U

Benchmarks

Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU
36.3 pt (43%)
Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 629     avg: 634     median: 633.5 (7%)     max: 638 Points
03570105140175210245280315350385420455490525560595630Tooltip
HWBOT x265 Benchmark v2.2 - HWBOT x265 4k Preset
5.3 fps (11%)
0123456789101112Tooltip
- 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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show all (including archived), 2022, 2021
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#294 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.256s

#295 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.256s

#296 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.256s

#297 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.256s

#298 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.256s

#299 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.256s

#300 linkCache_getLink using $NBC_LINKCACHE +0.002s ... 0.257s

#301 linkCache_getLink using $NBC_LINKCACHE +0.002s ... 0.259s

#302 linkCache_getLink no uid found +0s ... 0.259s

#303 linkCache_getLink using $NBC_LINKCACHE +0.003s ... 0.262s

#304 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.262s

#305 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.262s

#306 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.262s

#307 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.263s

#308 linkCache_getLink using $NBC_LINKCACHE +0.004s ... 0.267s

#309 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.267s

#310 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.267s

#311 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.267s

#312 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.267s

#313 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.267s

#314 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.267s

#315 linkCache_getLink using $NBC_LINKCACHE +0.002s ... 0.269s

#316 linkCache_getLink no uid found +0.002s ... 0.271s

#317 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.271s

#318 linkCache_getLink using $NBC_LINKCACHE +0.002s ... 0.273s

#319 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.273s

#320 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.273s

#321 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.273s

#322 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.274s

#323 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.274s

#324 linkCache_getLink using $NBC_LINKCACHE +0.004s ... 0.278s

#325 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.278s

#326 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.278s

#327 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.278s

#328 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.278s

#329 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.278s

#330 linkCache_getLink using $NBC_LINKCACHE +0.002s ... 0.28s

#331 linkCache_getLink no uid found +0.001s ... 0.281s

#332 linkCache_getLink using $NBC_LINKCACHE +0.002s ... 0.283s

#333 linkCache_getLink using $NBC_LINKCACHE +0.001s ... 0.284s

#334 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.284s

#335 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.284s

#336 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.284s

#337 linkCache_getLink using $NBC_LINKCACHE +0.001s ... 0.285s

#338 linkCache_getLink using $NBC_LINKCACHE +0.002s ... 0.287s

#339 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.287s

#340 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.288s

#341 linkCache_getLink using $NBC_LINKCACHE +0s ... 0.288s

#342 linkCache_getLink using $NBC_LINKCACHE +0.001s ... 0.289s

#343 min, max, avg, median took s +0s ... 0.289s

#344 return log +0.019s ... 0.308s

Reviews for the Intel Coffee Lake i5-8257U processor

Apple MacBook Pro 13 2019 2TB3 (Intel Iris Plus Graphics 645, 13.30")
» Apple MacBook Pro 13 2019: Entry-Level Pro with Touch Bar in review - Review
» Apple MacBook Pro 13 2019 2TB3 - External Review
» The less expensive MacBook Pro 13 is the better choice -

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» 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 i3-8109U
   2x 3 GHz - 3.6 GHz
» Intel Core i3-8100H
   4x 3 GHz

Surrounding CPUs

+ 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 - 4.9 GHz
- Intel Core i7-4960HQ
   4x 2.6 GHz - 3.8 GHz
- Intel Core i7-6700HQ
   4x 2.6 GHz - 3.5 GHz
Klaus Hinum (Update: 2019-07-16)