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Core i7-7660U vs i3-7100


Description
Both models i7-7660U and i3-7100 are based on Kaby Lake architecture.

The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.

Using the multithread performance as a reference, the i7-7660U gets a score of 132.8 k points while the i3-7100 gets 126.5 k points.

Summarizing, the i7-7660U is 1 times faster than the i3-7100. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806e9
906e9
Core
Kaby Lake-U
Kaby Lake-S
Architecture
Base frecuency
2.5 GHz
3.9 GHz
Boost frecuency
4 GHz
3.9 GHz
Socket
BGA 1356
LGA 1151
Cores/Threads
2/4
2/4
TDP
15 W
51 W
Cache L1 (d+i)
2x32+2x32 kB
2x32+2x32 kB
Cache L2
2x256 kB
2x256 kB
Cache L3
4096 kB
3072 kB
Date
January 2017
January 2017
Mean monothread perf.
57.46k points
58.55k points
Mean multithread perf.
132.81k points
126.47k 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
i3-7100
Test#1 (Integers)
22.46k
25.77k (x1.15)
Test#2 (FP)
19.29k
23.26k (x1.21)
Test#3 (Generic, ZIP)
4.77k
5.43k (x1.14)
Test#1 (Memory)
10.94k
4.09k (x0.37)
TOTAL
57.46k
58.55k (x1.02)

Multithread

i7-7660U

i3-7100
Test#1 (Integers)
56.67k
54.98k (x0.97)
Test#2 (FP)
46.95k
54.73k (x1.17)
Test#3 (Generic, ZIP)
12.36k
13.12k (x1.06)
Test#1 (Memory)
16.84k
3.65k (x0.22)
TOTAL
132.81k
126.47k (x0.95)

Performance/W
i7-7660U
i3-7100
Test#1 (Integers)
3778 points/W
1078 points/W
Test#2 (FP)
3130 points/W
1073 points/W
Test#3 (Generic, ZIP)
824 points/W
257 points/W
Test#1 (Memory)
1122 points/W
72 points/W
TOTAL
8854 points/W
2480 points/W

Performance/GHz
i7-7660U
i3-7100
Test#1 (Integers)
5614 points/GHz
6607 points/GHz
Test#2 (FP)
4823 points/GHz
5964 points/GHz
Test#3 (Generic, ZIP)
1193 points/GHz
1393 points/GHz
Test#1 (Memory)
2735 points/GHz
1049 points/GHz
TOTAL
14365 points/GHz
15014 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