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Core i7-8665U vs i7-7020U


Description
The i7-8665U is based on Whiskey Lake architecture while the i7-7020U is based on Kaby Lake.

Using the multithread performance as a reference, the i7-8665U gets a score of 109.7 k points while the i7-7020U gets 73.1 k points.

Summarizing, the i7-8665U is 1.5 times faster than the i7-7020U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806ec
806ea
Core
Whiskey Lake-U
Kaby Lake-U
Architecture
Base frecuency
1.9 GHz
2.3 GHz
Boost frecuency
4.8 GHz
2.3 GHz
Socket
BGA 1528
BGA 1356
Cores/Threads
4/8
2/4
TDP
15 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
2x32+2x32 kB
Cache L2
4x256 kB
2x256 kB
Cache L3
8192 kB
3072 kB
Date
April 2019
April 2018
Mean monothread perf.
35.19k points
33.63k points
Mean multithread perf.
109.72k points
73.15k points

AVX2 optimized benchmark
The benchmark in mode III (AVX2), like AVX1, is optimized to used 256 bits registers beside the second version of the Advanced Vector Extensions (AVX). The first AVX2 compatible CPU was released in 2013.
Monothread
i7-8665U
i7-7020U
Test#1 (Integers)
14.38k
14.25k (x0.99)
Test#2 (FP)
13.43k
12.72k (x0.95)
Test#3 (Generic, ZIP)
2.87k
2.81k (x0.98)
Test#1 (Memory)
4.49k
3.86k (x0.86)
TOTAL
35.19k
33.63k (x0.96)

Multithread

i7-8665U

i7-7020U
Test#1 (Integers)
47.22k
31.11k (x0.66)
Test#2 (FP)
46.99k
31.15k (x0.66)
Test#3 (Generic, ZIP)
10.08k
6.9k (x0.69)
Test#1 (Memory)
5.42k
3.99k (x0.74)
TOTAL
109.72k
73.15k (x0.67)

Performance/W
i7-8665U
i7-7020U
Test#1 (Integers)
3148 points/W
2074 points/W
Test#2 (FP)
3133 points/W
2076 points/W
Test#3 (Generic, ZIP)
672 points/W
460 points/W
Test#1 (Memory)
361 points/W
266 points/W
TOTAL
7314 points/W
4877 points/W

Performance/GHz
i7-8665U
i7-7020U
Test#1 (Integers)
2996 points/GHz
6196 points/GHz
Test#2 (FP)
2799 points/GHz
5528 points/GHz
Test#3 (Generic, ZIP)
599 points/GHz
1221 points/GHz
Test#1 (Memory)
936 points/GHz
1679 points/GHz
TOTAL
7330 points/GHz
14624 points/GHz

Monothread performance graph
Monothread performance graphics gives the performance vs time. They are useful to measure the time it takes to the CPU to reach the maximum performance.

Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Multithread performance graph
Multithread graphs measure the performance against a heavy load during certain time.

If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Hardlimit Benchmark Central - Ver. 3.11.4