Intel Core i7-8550U vs Intel Core i7-8650U

Intel Core i7-8550U

► remove Intel 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 i7-8650U

► remove Intel 8650U

The Intel Core i7-8650U 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 i7-7600U, which were still dual-cores, the i7-8650U is equipped with four cores but at a lower base frequency of 1.9 GHz. The Turbo Boost can go up to 4,2 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 behaviour 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.

Intel Core i7-8550UIntel Core i7-8650U
Intel Core i7Intel Core i7
Kaby Lake RefreshKaby Lake Refresh
: Core i7 Kaby Lake Refresh
Intel Core i7-8650U1900 - 4200 MHz4 / 88 MB
» Intel Core i7-8550U1800 - 4000 MHz4 / 88 MB
» Intel Core i7-8650U1900 - 4200 MHz4 / 88 MB
Intel Core i7-8550U1800 - 4000 MHz4 / 88 MB
1800 - 4000 MHz1900 - 4200 MHz
256 KB256 KB
1 MB1 MB
8 MB8 MB
4 / 84 / 8
15 15
14 14
BGA1356BGA1356
Dual-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 - 1150 MHz)
$409 U.S.$409 U.S.
Intel Core i7 8650U

Cinebench R15 - CPU Multi 64Bit
min: 301     avg: 575.8     median: 558 (13%)     max: 761 Points
min: 447     avg: 598.7     median: 618.5 (14%)     max: 675 Points
Cinebench R15 - CPU Single 64Bit
min: 108     avg: 160.2     median: 164 (75%)     max: 172 Points
min: 137     avg: 168.7     median: 169.5 (78%)     max: 178 Points
Cinebench R11.5 - CPU Multi 64Bit
min: 4.38     avg: 6.3     median: 6.1 (23%)     max: 8.56 Points
min: 5.77     avg: 6.7     median: 7 (26%)     max: 7.24 Points
Cinebench R11.5 - CPU Single 64Bit
min: 1.43     avg: 1.8     median: 1.9 (77%)     max: 1.95 Points
min: 1.7     avg: 1.9     median: 2 (82%)     max: 2.04 Points
Cinebench R10 - Rendering Single 32Bit
min: 4202     avg: 6336.7     median: 6428 (70%)     max: 8211 Points
min: 5307     avg: 6336.8     median: 6629 (73%)     max: 6782 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 11694     avg: 17954.7     median: 17362 (35%)     max: 24180 Points
min: 16227     avg: 18738     median: 18635 (37%)     max: 21455 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
min: 12279     avg: 23152.8     median: 22717 (30%)     max: 31667 Points
21677 Points (29%)
Cinebench R10 - Rendering Single CPUs 64Bit
min: 6737     avg: 8064.8     median: 8370.5 (81%)     max: 8436 Points
6864 Points (67%)
wPrime 2.0x - 1024m *
min: 257.514     avg: 352     median: 366.7 (4%)     max: 435 seconds
min: 268.279     avg: 301.9     median: 302.8 (4%)     max: 334.6 seconds
wPrime 2.0x - 32m *
min: 7.047     avg: 9.8     median: 9.9 (2%)     max: 12.7 seconds
min: 8.636     avg: 9.6     median: 9.9 (2%)     max: 10.277 seconds
wPrime 1.55 - 1024m *
847.3 seconds (3%)
413.8 seconds (2%)
wPrime 1.55 - 32m *
26.3 seconds (14%)
10.3 seconds (5%)
WinRAR - Result
min: 3847     avg: 4487.1     median: 4374 (51%)     max: 5287 KB/s
min: 4140     avg: 4423.3     median: 4319 (51%)     max: 4915 KB/s
X264 HD Benchmark 4.0 - Pass 2
min: 32     avg: 35.3     median: 33.1 (23%)     max: 41 fps
min: 35     avg: 39.1     median: 39.8 (27%)     max: 41.98 fps
X264 HD Benchmark 4.0 - Pass 1
min: 143.6     avg: 153.9     median: 147.9 (55%)     max: 178 fps
min: 149     avg: 165.4     median: 169.6 (63%)     max: 173.19 fps
HWBOT x265 Benchmark v2.2 - 4k Preset
min: 3.88     avg: 4.2     median: 4.2 (23%)     max: 4.43 fps
TrueCrypt - Serpent Mean 100MB
min: 0.357     avg: 0.4     median: 0.4 (0%)     max: 0.469 GB/s
min: 0.393     avg: 0.4     median: 0.4 (0%)     max: 0.444 GB/s
TrueCrypt - Twofish Mean 100MB
min: 0.583     avg: 0.7     median: 0.7 (24%)     max: 0.793 GB/s
min: 0.662     avg: 0.7     median: 0.7 (24%)     max: 0.733 GB/s
TrueCrypt - AES Mean 100MB
min: 3.3     avg: 4.2     median: 4.3 (22%)     max: 4.6 GB/s
min: 3.9     avg: 4.2     median: 4.3 (22%)     max: 4.4 GB/s
Blender 2.79 *
min: 841.1     avg: 888.9     median: 888.9 (14%)     max: 936.7 Seconds
3DMark 06 - CPU
min: 4534     avg: 5951.3     median: 5845 (17%)     max: 7795 Points
min: 6930     avg: 7272.8     median: 7111 (20%)     max: 7939 Points
Super Pi mod 1.5 XS 1M *
min: 9     avg: 10.7     median: 9.3 (2%)     max: 17.455 Seconds
min: 8     avg: 8.5     median: 8.4 (2%)     max: 9 Seconds
Super Pi mod 1.5 XS 2M *
min: 20     avg: 23.2     median: 21.1 (1%)     max: 32.72 Seconds
min: 19     avg: 19.5     median: 19.5 (1%)     max: 20.1 Seconds
Super Pi Mod 1.5 XS 32M *
min: 509.5     avg: 575.1     median: 533 (2%)     max: 740.35 Seconds
min: 501     avg: 514     median: 506.5 (2%)     max: 542 Seconds
3DMark Vantage - P CPU no PhysX 1280x1024
21623 Points (36%)
3DMark 11 - Performance Physics 1280x720
min: 3961     avg: 6792.3     median: 6786 (37%)     max: 9527 points
min: 5168     avg: 7237.3     median: 7024 (38%)     max: 8887 points
3DMark - Ice Storm Standard Physics 1280x720
min: 16314     avg: 42803.2     median: 44682 (29%)     max: 55226 Points
min: 41248     avg: 42987.8     median: 41453 (27%)     max: 47797 Points
3DMark - Ice Storm Extreme Physics 1920x1080
min: 16312     avg: 37535.7     median: 36876 (48%)     max: 51937 Points
min: 41011     avg: 43028.8     median: 41405.5 (54%)     max: 48293 Points
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
min: 27917     avg: 50496.2     median: 53339 (68%)     max: 58213 Points
min: 44090     avg: 52920     median: 56455 (71%)     max: 58675 Points
3DMark - Cloud Gate Standard Physics 1280x720
min: 3437     avg: 5794.8     median: 5739 (15%)     max: 7725 Points
min: 4442     avg: 6048.2     median: 6275 (16%)     max: 7416 Points
3DMark - Fire Strike Physics 1920x1080
min: 3961     avg: 8337.5     median: 8820 (33%)     max: 11110 Points
min: 6823     avg: 9067.9     median: 9263 (34%)     max: 10541 Points
Geekbench 3 - 32 Bit Multi-Core Score
min: 8918     avg: 12331.5     median: 12523 (40%)     max: 14144 Points
Geekbench 3 - 32 Bit Single-Core Score
min: 2471     avg: 3662.7     median: 3779 (80%)     max: 4020 Points
Geekbench 3 - 64 Bit Multi-Core Score
min: 11637     avg: 12833.5     median: 12833.5 (34%)     max: 14030 Points
Geekbench 3 - 64 Bit Single-Core Score
min: 3784     avg: 3948.5     median: 3948.5 (80%)     max: 4113 Points
Geekbench 4.0 - Compute OpenCL Score
min: 22560     avg: 37002.2     median: 33412 (16%)     max: 76321 Points
Geekbench 4.0 - 64 Bit Multi-Core Score
min: 10747     avg: 13315.7     median: 13251 (48%)     max: 15294 Points
Geekbench 4.0 - 64 Bit Single-Core Score
min: 4439     avg: 4685.6     median: 4699 (81%)     max: 4858 Points
Geekbench 4.1/4.2 - 64 Bit Single-Core Score
min: 4555     avg: 4846.7     median: 4871 (77%)     max: 4997 Points
Geekbench 4.1/4.2 - 64 Bit Multi-Core Score
min: 10869     avg: 14156.1     median: 14554.5 (40%)     max: 16294 Points
Mozilla Kraken 1.1 - Total Score *
min: 876.6     avg: 1083.1     median: 1085.7 (2%)     max: 2114.4 ms
min: 809     avg: 1149.9     median: 1082.6 (2%)     max: 1911.9 ms
Sunspider - 1.0 Total Score *
min: 63.2     avg: 79.2     median: 70.2 (1%)     max: 122.7 ms
min: 63.8     avg: 70.1     median: 71 (1%)     max: 74.5 ms
Octane V2 - Total Score
min: 17296     avg: 34139.6     median: 34143.5 (70%)     max: 42043 Points
min: 11491     avg: 31478.7     median: 33800.5 (70%)     max: 42822 Points
Power Consumption - Prime95 V28,10 Stress Power Consumption (external Monitor) ultra *
100%
1 8550U +
min: 33.7     avg: 47.6     median: 47.6 (13%)     max: 61.4 Watt
Power Consumption - Cinebench R15 Multi Power Consumption (external Monitor) ultra *
100%
1 8550U +
min: 28.9     avg: 41.3     median: 31.9 (8%)     max: 63.2 Watt

Average Benchmarks Intel Core i7-8550U → 100%

Average Benchmarks Intel Core i7-8650U → 104%

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

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