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Intel Core i7-8550U vs Intel Core i5-8250U

Intel Core i7-8550U

► remove from comparison Intel i5-8550U

The Intel Core i7-8550U is a power efficient quad-core SoC for notebooks and Ultrabooks based on the Kaby Lake Refresh generation and was announced in August 2017. Contrary to its direct predecessors Core i7-7500U and i5-7260U, respectively, which were still dual-cores, the i7-8550U is equipped with four cores but at a lower base frequency of 1.8 GHz. The Turbo Boost is not specified yet, but should be at least 3.7 - 4 GHz and therefore also offer good short term single core speeds. The GPU is now named Intel UHD Graphics 620 but otherwise identical to the Intel HD Graphics 620. The integrated memory controller supports DDR4-2400 / LPDDR3-2133 and dual channel memory.

Architecture

Intel basically uses the same micro architecture compared to Skylake, 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

The performance of the i7-8550U depends on the cooling solution of the laptop and the defined TDP limits for short and long term performance. This leads to big differences in our benchmark scores ranging from the 15 Watt reference by Intel up to the 23% higher score of the Inspiron 17-7773 in the Cinebench R15 Multi benchmark. Especially when taxing the CPU for longer periods, these differences can be even higher.

In our usual benchmarks, the average i7-8550U is as fast as the 35 Watt rated Core i5-7440HQ. For single thread performance, the high Turbo Boost frequency helps achieving one of the highest scores for mobile CPUs.

Graphics

The integrated Intel UHD Graphics 620 (Intel Gen 9.5) is untouched from the 8th Gen Kaby Lake chips. With fast dual-channel memory it can reach the performance of a dedicated GeForce 920M.

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 (14nm+), the same as the 7th Gen Kaby Lake processors. Intel still specifies the TDP with 15 Watts, which is typical for ULV chips. Depending on the usage scenario, the TDP can vary between 7.5 (cTDP Down) and 25 Watts.

Intel Core i5-8250U

► remove from comparison Intel i5-8250U

The Intel Core i5-8250U is a power efficient quad-core SoC for notebooks and Ultrabooks based on the Kaby Lake Refresh generation and was announced in August 2017. Contrary to its direct predecessor the Core i5-7200U, which were still dual-cores, the i7-8250U is equipped with four cores but at a lower base frequency of 1.6 GHz. The Turbo Boost can go up to 3,4 GHz and therefore also offer good short term single core speeds. The GPU is now named Intel UHD Graphics 620 but otherwise identical to the Intel HD Graphics 620. The integrated memory controller supports DDR4-2400 / LPDDR3-2133 and dual channel memory.

Architecture

Intel basically uses the same micro architecture compared to Skylake, 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

According to Intel, the new quad core models are up to 40% faster than their dual core predecessors. Due to the reduced TDP and the same 14nm+ process, the long term performance and throttling behavior will be interesting and depending on the laptop design. Therefore, the older 35 Watt quad-core models should be faster in applications that demand longer CPU loads.

Graphics

The integrated Intel UHD Graphics 620 (Intel Gen 9.5) is untouched from the 8th Gen Kaby Lake chips. With fast dual-channel memory it can reach the performance of a dedicated GeForce 920M.

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 (14nm+), the same as the 7th Gen Kaby Lake processors. Intel still specifies the TDP with 15 Watts, which is typical for ULV chips. Depending on the usage scenario, the TDP can vary between 7.5 (cTDP Down) and 25 Watts.

ModelIntel Core i7-8550UIntel Core i5-8250U
SeriesIntel Kaby Lake RefreshIntel Kaby Lake Refresh
CodenameKaby Lake RefreshKaby Lake Refresh
Series: Kaby Lake Refresh Kaby Lake Refresh
Intel Core i7-8650U compare1.9 - 4.2 GHz4 / 88 MB
» Intel Core i7-8550U1.8 - 4 GHz4 / 88 MB
Intel Core i5-8350U compare1.7 - 3.6 GHz4 / 86 MB
Intel Core i5-8250U1.6 - 3.4 GHz4 / 86 MB
Intel Core i3-8130U compare2.2 - 3.4 GHz2 / 44 MB
Intel Pentium Gold 4417U compare2.3 GHz2 / 42 MB
Intel Core i7-8650U compare1.9 - 4.2 GHz4 / 88 MB
Intel Core i7-8550U1.8 - 4 GHz4 / 88 MB
Intel Core i5-8350U compare1.7 - 3.6 GHz4 / 86 MB
» Intel Core i5-8250U1.6 - 3.4 GHz4 / 86 MB
Intel Core i3-8130U compare2.2 - 3.4 GHz2 / 44 MB
Intel Pentium Gold 4417U compare2.3 GHz2 / 42 MB
Clock1800 - 4000 MHz1600 - 3400 MHz
L1 Cache256 KB256 KB
L2 Cache1 MB1 MB
L3 Cache8 MB6 MB
Cores / Threads4 / 84 / 8
TDP15 Watt15 Watt
Technology14 nm14 nm
SocketBGA1356BGA1356
FeaturesDual-Channel DDR4 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NIDual-Channel DDR4 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI
iGPUIntel UHD Graphics 620 (300 - 1150 MHz)Intel UHD Graphics 620 (300 - 1100 MHz)
Architecturex86x86
$409 U.S.$297 U.S.
Announced

Benchmarks

Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU - i5-8550U
35.2 pt (41%)
Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU - i5-8250U
32.9 pt (39%)
Cinebench R23 - Cinebench R23 Multi Core
2914 Points (5%)
min: 3022     avg: 3108     median: 3108 (5%)     max: 3194 Points
Cinebench R23 - Cinebench R23 Single Core
1021 Points (51%)
min: 840     avg: 874     median: 873.5 (43%)     max: 907 Points
Cinebench R20 - Cinebench R20 CPU (Single Core)
min: 383     avg: 388.5     median: 388.5 (50%)     max: 394 Points
min: 332     avg: 349.2     median: 353 (45%)     max: 355 Points
Cinebench R20 - Cinebench R20 CPU (Multi Core)
min: 1118     avg: 1128     median: 1128 (5%)     max: 1138 Points
min: 846     avg: 1148     median: 1171 (5%)     max: 1325 Points
Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 301     avg: 576     median: 553 (6%)     max: 761 Points
04080120160200240280320360400440480520560600640680720760Tooltip
min: 320     avg: 570     median: 562 (6%)     max: 730 Points
04080120160200240280320360400440480520560600640680720Tooltip
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
min: 108     avg: 159.5     median: 163 (56%)     max: 172 Points
min: 81     avg: 141.1     median: 143 (49%)     max: 147 Points
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 4.38     avg: 6.3     median: 6.1 (11%)     max: 8.56 Points
min: 3.15     avg: 6     median: 5.9 (11%)     max: 7.76 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
min: 1.43     avg: 1.8     median: 1.9 (54%)     max: 1.95 Points
min: 0.91     avg: 1.6     median: 1.6 (47%)     max: 1.79 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 4202     avg: 6333     median: 6423 (57%)     max: 8211 Points