Core i7-8665U

Details and Benchmarks for Intel Core i7-8665U

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Please take all results with a big grain of salt. Sysbuilds is in alpha stage at the moment which can lead to wrong data, strange counting errors, silly results and more. This site is under active development.

Benchmark Results

Combined benchmark scores based on multiple data points, giving a quick overview of this processor's performance.

Overall Score

Overall score for Core i7-8665U based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,879 Rank: 972
Rank Name Score Visual
968 Core i5-4440 4,882
+0.1%
969 Core i5-7Y57 4,881
+0%
970 Core i7-4702HQ 4,881
+0%
971 Core i5-6360U 4,879
+0%
972 Core i7-8665U 4,879
973 Xeon E5-2650L v4 4,878
+-0%
974 Core i7-3820QM 4,877
+-0%
975 Core i7-4702MQ 4,877
+-0%
976 Xeon E5-2470 v2 4,875
-0.1%
977 Core M3-7Y32 4,874
-0.1%

View full ranking →

Multicore Score

Multicore performance score for Core i7-8665U based on multi-threaded benchmark results.

4,799 Rank: 844
Rank Name Score Visual
840 Ryzen 5 3550H 4,801
+0%
841 Core i5-8259U 4,801
+0%
842 Core i7-8559U 4,800
+0%
843 Core i7-6700TE 4,800
+0%
844 Core i7-8665U 4,799
845 Core i7 965 4,796
-0.1%
846 Atom C3955 4,795
-0.1%
847 Xeon E3-1271 v3 4,795
-0.1%
848 Core i7-4702HQ 4,795
-0.1%
849 Intel Core i3-390M 4,793
-0.1%

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Singlecore Score

Single-core performance score for Core i7-8665U based on single-threaded benchmark results.

4,932 Rank: 988
Rank Name Score Visual
984 Core i3-4130T 4,935
+0.1%
985 Xeon D-1527 4,934
+0%
986 Core i7-3770S 4,934
+0%
987 Ryzen Threadripper 3990X 4,933
+0%
988 Core i7-8665U 4,932
989 Ryzen 5 2500U 4,931
+-0%
990 Core i7-3820 4,927
-0.1%
991 Core i7-3720QM 4,926
-0.1%
992 Xeon E5-2650 v4 4,923
-0.2%
993 Pentium G3450 4,922
-0.2%

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Workload Scores

Performance scores grouped by workload type, normalized and aggregated from multiple raw benchmark results.

Number Crunching

Aggregated score for Core i7-8665U based on integer math, floating point math, and prime number computation benchmarks.

4,665 Rank: 774
Rank Name Score Visual
770 Ryzen 5 1400 4,667
+0%
771 Xeon X5650 4,667
+0%
772 Core i7-6820HQ 4,666
+0%
773 Ryzen 5 2400GE 4,666
+0%
774 Core i7-8665U 4,665
775 Xeon E3-1225 v3 4,665
+0%
776 Xeon E3-1230 V2 4,665
+0%
777 Xeon Silver 4112 4,664
+-0%
778 Atom C3858 4,664
+-0%
779 Core i5-4690K 4,664
+-0%

View full ranking →

Data Processing

Aggregated score for Core i7-8665U based on data encryption, data compression, and string sorting benchmarks.

4,626 Rank: 839
Rank Name Score Visual
835 Core i7-8650U 4,628
+0%
836 Xeon E3-1265L v2 4,628
+0%
837 Core i7-4702HQ 4,627
+0%
838 Core i3-8100 4,626
+0%
839 Core i7-8665U 4,626
840 Ryzen 3 3300U 4,626
+0%
841 Core i7-6822EQ 4,625
+-0%
842 Core i5-7500 4,625
+-0%
843 Phenom II X6 1100T 4,625
+-0%
844 Core i5-6600 4,624
+-0%

View full ranking →

Physics & Compute

Aggregated score for Core i7-8665U based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,675 Rank: 787
Rank Name Score Visual
783 Core i7-3820 4,676
+0%
784 Core i7-4722HQ 4,676
+0%
785 Ryzen 5 PRO 3400G 4,675
+0%
786 Xeon D-1622 4,675
+0%
787 Core i7-8665U 4,675
788 Core i5-4570 4,674
+-0%
789 Xeon E3-1275 V2 4,674
+-0%
790 Core i5-1035G1 4,672
-0.1%
791 Ryzen 5 2400G 4,672
-0.1%
792 Core i5-4570S 4,672
-0.1%

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Core i7-8665U Details

The Intel Core i7-8665U sits within the broader lineup of Intel's 8th generation mobile processors, designed for ultrabooks and thin-and-light laptops. Released in 2018, it's now over seven years old, placing it firmly in the category of older but still functional mobile CPUs. While no longer competitive with modern high-performance processors, it remains a capable performer for light to moderate workloads, especially in systems where power efficiency and integrated graphics are priorities.

Built on Intel's 14 nm manufacturing process, the Core i7-8665U features a quad-core, eight-thread design with a base clock of 1.9 GHz and a maximum turbo frequency of 4.8 GHz. This high single-core boost frequency enables it to deliver strong performance in tasks that rely on fast single-threaded execution. The processor is designed for the FCBGA1528 socket, typical of mobile platforms, and operates at a low 15 W TDP, which contributes to its energy efficiency and suitability for thin devices.

The Core i7-8665U integrates Intel's UHD Graphics 620, which operates at a base frequency of 300 MHz and can burst up to 1.15 GHz. This integrated GPU supports up to three displays and provides adequate performance for basic graphics tasks, such as web browsing, video playback, and light photo editing. While not suitable for modern gaming, it is sufficient for users who don't require discrete graphics.

In terms of memory support, the processor handles DDR4-2400 and LPDDR3-2133 at up to 32 GB of total system memory, with a maximum memory bandwidth of 37.5 GB/s. It supports two memory channels and PCIe 3.0 with up to 16 lanes, allowing for flexible expansion with modern storage and connectivity options.

The CPU supports a range of Intel technologies, including Hyper-Threading, Intel vPro, VT-x, VT-d, and AES-NI, making it suitable for business and productivity environments. It also includes features like Intel SpeedStep and Secure Key, enhancing both performance and security.

In benchmark testing, the Core i7-8665U achieves an overall score of 4879, ranking #971 of 2060, with a single-core score of 4932 (#988) and a multicore score of 4799 (#844). While these results reflect its age, they still place it above many older mobile processors, such as the Core i7-4702HQ and Xeon E5-2650 v4. However, it falls behind modern competitors in both single-core and multicore performance, with top-tier processors like the Ryzen Threadripper 9995WX achieving over double the overall score.

As of March 2026, the Core i7-8665U is best suited for users who prioritize portability, battery life, and cost-effectiveness over raw performance. It remains a viable option for general computing, office work, and light multimedia tasks, but it is no longer recommended for demanding applications like video editing, 3D rendering, or gaming.
Frequently Compared

AMD Ryzen 7 2700E 4 views

Intel Intel Celeron N3050 4 views

AMD Ryzen 7 PRO 2700 4 views

AMD Ryzen Threadripper 2920X 3 views

AMD Ryzen 3 PRO 2200GE 1 view

AMD Ryzen 9 PRO 3900 1 view

AMD Ryzen 5 PRO 3500U 1 view

Intel Xeon Silver 4210 1 view

Intel Xeon Silver 4208 1 view

Intel Xeon Silver 4110 1 view

Intel Core i7-8665U

Main Specifications

Designer: Intel
Name: Core i7-8665U
Model Number: i7-8665U
Cores: 4
Threads: 8
Base Frequency: 1900 MHz
Socket: FCBGA1528
Max CPUs: 1
TDP: 15 W

Cache Specifications

Memory Specifications

Supported Memory Type: DDR4-2400, LPDDR3-2133
Memory Channels: 2
Maximum Memory: 0 GB
Maximum Bandwidth: 37.5 GB/s
ECC Support: No

PCI-Express Specifications

PCIe Revision: 3.0
PCIe Lanes: 16
PCIe Configuration: 1x4, 2x2, 1x2+2x1 and 4x1

Integrated Graphics

GPU: UHD Graphics 620
GPU Designer: Intel
GPU Max Frequency: 1150 MHz

Physical Specifications

Process: 14 nm
Word Size: 64-bit

CPU Features

SSE4.1 SSE4.2 AVX2 AES x86-64 HT EIST TXT vPro VT-x VT-d EPT Secure Key SMEP SIPP IPT TSX Flex Memory FMA
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