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Core i5-8265U vs i7-8665U


Description
Both models i5-8265U and i7-8665U are based on Whiskey Lake architecture.

Whiskey Lake is the third 14nm process-refinement and it’s a mobile architecture with a short list of U models.

Using the multithread performance as a reference, the i5-8265U gets a score of 143.2 k points while the i7-8665U gets 109.7 k points.

Summarizing, the i5-8265U is 1.3 times faster than the i7-8665U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806ec
806ec
Core
Whiskey Lake-U
Whiskey Lake-U
Architecture
Base frecuency
1.6 GHz
1.9 GHz
Boost frecuency
3.9 GHz
4.8 GHz
Socket
BGA1528
BGA 1528
Cores/Threads
4/8
4/8
TDP
15 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
6144 kB
8192 kB
Date
August 2018
April 2019
Mean monothread perf.
46.67k points
35.19k points
Mean multithread perf.
143.23k points
109.72k 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
i5-8265U
i7-8665U
Test#1 (Integers)
19.19k
14.38k (x0.75)
Test#2 (FP)
17.47k
13.43k (x0.77)
Test#3 (Generic, ZIP)
4.04k
2.87k (x0.71)
Test#1 (Memory)
5.97k
4.49k (x0.75)
TOTAL
46.67k
35.19k (x0.75)

Multithread

i5-8265U

i7-8665U
Test#1 (Integers)
64.43k
47.22k (x0.73)
Test#2 (FP)
61.91k
46.99k (x0.76)
Test#3 (Generic, ZIP)
13.36k
10.08k (x0.75)
Test#1 (Memory)
3.52k
5.42k (x1.54)
TOTAL
143.23k
109.72k (x0.77)

Performance/W
i5-8265U
i7-8665U
Test#1 (Integers)
4296 points/W
3148 points/W
Test#2 (FP)
4128 points/W
3133 points/W
Test#3 (Generic, ZIP)
890 points/W
672 points/W
Test#1 (Memory)
235 points/W
361 points/W
TOTAL
9548 points/W
7314 points/W

Performance/GHz
i5-8265U
i7-8665U
Test#1 (Integers)
4920 points/GHz
2996 points/GHz
Test#2 (FP)
4478 points/GHz
2799 points/GHz
Test#3 (Generic, ZIP)
1037 points/GHz
599 points/GHz
Test#1 (Memory)
1531 points/GHz
936 points/GHz
TOTAL
11966 points/GHz
7330 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