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Core i7-7660U vs i5-5675R


Description
The i7-7660U is based on Kaby Lake architecture while the i5-5675R is based on Broadwell.

Using the multithread performance as a reference, the i7-7660U gets a score of 132.8 k points while the i5-5675R gets 194.2 k points.

Summarizing, the i5-5675R is 1.5 times faster than the i7-7660U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806e9
40671
Core
Kaby Lake-U
Bradwell-H
Architecture
Base frecuency
2.5 GHz
3.1 GHz
Boost frecuency
4 GHz
3.6 GHz
Socket
BGA 1356
BGA1364
Cores/Threads
2/4
4/4
TDP
15 W
65 W
Cache L1 (d+i)
2x32+2x32 kB
4x32+4x32 kB
Cache L2
2x256 kB
4x256 kB
Cache L3
4096 kB
4096 kB
Date
January 2017
June 2015
Mean monothread perf.
57.46k points
51.43k points
Mean multithread perf.
132.81k points
194.2k 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
i7-7660U
i5-5675R
Test#1 (Integers)
22.46k
21.91k (x0.98)
Test#2 (FP)
19.29k
18.59k (x0.96)
Test#3 (Generic, ZIP)
4.77k
5.2k (x1.09)
Test#1 (Memory)
10.94k
5.72k (x0.52)
TOTAL
57.46k
51.43k (x0.9)

Multithread

i7-7660U

i5-5675R
Test#1 (Integers)
56.67k
84.92k (x1.5)
Test#2 (FP)
46.95k
72.09k (x1.54)
Test#3 (Generic, ZIP)
12.36k
20.13k (x1.63)
Test#1 (Memory)
16.84k
17.07k (x1.01)
TOTAL
132.81k
194.2k (x1.46)

Performance/W
i7-7660U
i5-5675R
Test#1 (Integers)
3778 points/W
1306 points/W
Test#2 (FP)
3130 points/W
1109 points/W
Test#3 (Generic, ZIP)
824 points/W
310 points/W
Test#1 (Memory)
1122 points/W
263 points/W
TOTAL
8854 points/W
2988 points/W

Performance/GHz
i7-7660U
i5-5675R
Test#1 (Integers)
5614 points/GHz
6087 points/GHz
Test#2 (FP)
4823 points/GHz
5164 points/GHz
Test#3 (Generic, ZIP)
1193 points/GHz
1445 points/GHz
Test#1 (Memory)
2735 points/GHz
1590 points/GHz
TOTAL
14365 points/GHz
14286 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