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Intel Core i7-7660U

Intel i7-7660U

The Intel Core i7-7660U is a fast dual-core SoC for notebooks and Ultrabooks based on the Kaby Lake architecture and was announced in January 2017. The CPU has two processor cores clocked at 2.5-4 GHz (two cores up to 3.8 GHz). The processor can execute up to four threads simultaneously thanks to Hyper Threading. It is also equipped with an Intel Iris Plus Graphics 640 GPU with 64 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 the Core i7-7600U, the 7660 does have a higher single-core Turbo of 4 GHz (+100 MHz), but a lower dual-core Turbo (-100 MHz) and a lower base frequency (-300 MHz). However, the CPU part can also use the 64 MB eDRAM as L5 cache.

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

At 2.5-4 GHz, the Core i7-7660U has a slightly lower frequency (except for the single-core Turbo) compared to the Core i7-7600U, but the CPU part can also use the 64 MB eDRAM, so the performance should be similar.

Graphics

The integrated Intel Iris Plus 640 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 920MX thanks to fast eDRAM cache. However, there aren't any significant improvements compared to the old Iris Pro 540, 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 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.

SeriesIntel Kaby Lake
CodenameKaby Lake

Series: Kaby Lake Kaby Lake

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Intel Core i7-7920HQ compare3.1 - 4.1 GHz4 / 8 cores8 MB L3
Intel Core i7-7700T compare2.9 - 3.8 GHz4 / 8 cores8 MB L3
Intel Core i5-7600K compare3.8 - 4.2 GHz4 / 4 cores8 MB L3
Intel Xeon E3-1505M v6 compare3 - 4 GHz4 / 8 cores8 MB L3
Intel Core i7-7820HQ compare2.9 - 3.9 GHz4 / 8 cores8 MB L3
Intel Core i7-7820HK compare2.9 - 3.9 GHz4 / 8 cores8 MB L3
Intel Core i7-7700HQ compare2.8 - 3.8 GHz4 / 8 cores6 MB L3
Intel Core i5-7500 compare3.4 - 3.8 GHz4 / 4 cores6 MB L3
Intel Core i5-7440HQ compare2.8 - 3.8 GHz4 / 4 cores6 MB L3
Intel Core i7-7567U compare3.5 - 4 GHz2 / 4 cores4 MB L3
Intel Core i7-7660U « 2.5 - 4 GHz2 / 4 cores4 MB L3
Intel Core i7-7600U compare2.8 - 3.9 GHz2 / 4 cores4 MB L3
Intel Core i5-7300HQ compare2.5 - 3.5 GHz4 / 4 cores6 MB L3
Intel Core i5-7500T compare2.7 - 3.3 GHz4 / 4 cores6 MB L3
Intel Core i5-7287U compare3.3 - 3.7 GHz2 / 4 cores4 MB L3
Intel Core i7-7560U compare2.4 - 3.8 GHz2 / 4 cores4 MB L3
Intel Core i5-7267U compare3.1 - 3.5 GHz2 / 4 cores4 MB L3
Intel Core i5-7360U compare2.3 - 3.6 GHz2 / 4 cores4 MB L3
Intel Core i7-7500U compare2.7 - 3.5 GHz2 / 4 cores4 MB L3
Intel Core i5-7300U compare2.6 - 3.5 GHz2 / 4 cores3 MB L3
Intel Core i5-7260U compare2.2 - 3.4 GHz2 / 4 cores4 MB L3
Intel Core i5-7200U compare2.5 - 3.1 GHz2 / 4 cores3 MB L3
Intel Core i3-7100H compare3 GHz2 / 4 cores3 MB L3
Intel Core i3-7167U compare2.8 GHz2 / 4 cores3 MB L3
Intel Core i7-7Y75 compare1.3 - 3.6 GHz2 / 4 cores4 MB L3
Intel Core i5-7Y57 compare1.2 - 3.3 GHz2 / 4 cores4 MB L3
Intel Core i5-7Y54 compare1.2 - 3.2 GHz2 / 4 cores4 MB L3
Intel Core i3-7100U compare2.4 GHz2 / 4 cores3 MB L3
Intel Core m3-7Y32 compare1 - 3 GHz2 / 4 cores4 MB L3
Intel Pentium Gold 4415U compare2.3 GHz2 / 4 cores2 MB L3
Intel Core m3-7Y30 compare1 - 2.6 GHz2 / 4 cores4 MB L3
Intel Celeron 3965U compare2.2 GHz2 / 2 cores2 MB L3
Intel Core i3-7020U compare2.3 GHz2 / 4 cores3 MB L3
Intel Celeron 3867U compare1.8 GHz2 / 2 cores2 MB L3
Intel Celeron 3865U compare1.8 GHz2 / 2 cores2 MB L3
Intel Pentium Gold 4425Y compare1.7 GHz2 / 4 cores2 MB L3
Intel Pentium Gold 4415Y compare1.6 GHz2 / 4 cores2 MB L3
Intel Pentium Gold 4410Y compare1.5 GHz2 / 4 cores2 MB L3
Intel Celeron 3965Y compare1.5 GHz2 / 2 cores2 MB L3
Clock Rate2500 - 4000 MHz
Level 1 Cache128 KB
Level 2 Cache512 KB
Level 3 Cache4 MB
Number of Cores / Threads2 / 4
Power Consumption (TDP = Thermal Design Power)15 Watt
Manufacturing Technology14 nm
Max. Temperature100 °C
SocketBGA1356
FeaturesDual-Channel DDR4 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI
GPUIntel Iris Plus Graphics 640 (300 - 1050 MHz)
64 Bit64 Bit support
Architecturex86
Starting Price$415 U.S.
Announcement Date01/03/2017

Benchmarks

Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 397     avg: 403.5     median: 403.5 (3%)     max: 410 Points
0255075100125150175200225250275300325350375400Tooltip
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 4.39     avg: 4.5     median: 4.5 (6%)     max: 4.55 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
min: 1.84     avg: 1.9     median: 1.9 (46%)     max: 1.89 Points
wPrime 2.10 - wPrime 2.0 1024m *
min: 433     avg: 435.5     median: 435.5 (5%)     max: 438 s
3DMark 06 - CPU - 3DMark 06 - CPU
min: 5193     avg: 5227     median: 5226.5 (11%)     max: 5260 Points
3DMark - 3DMark Fire Strike Standard Physics
min: 5412     avg: 5561     median: 5560.5 (10%)     max: 5709 Points
Sunspider - Sunspider 1.0 Total Score *
min: 65.2     avg: 65.6     median: 65.6 (1%)     max: 66 ms
Octane V2 - Octane V2 Total Score
min: 35767     avg: 36437     median: 36436.5 (33%)     max: 37106 Points
Power Consumption - Cinebench R15 Multi Power Consumption - external Monitor *
min: 39.2     avg: 40     median: 40 (7%)     max: 40.8 Watt
Power Consumption - Cinebench R15 Multi Power Efficiency - external Monitor
min: 9.73     avg: 10.1     median: 10.1 (8%)     max: 10.5 Points per Watt
- 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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