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Core i3-7100 vs i5-6400


Description
The i3-7100 is based on Kaby Lake architecture while the i5-6400 is based on Skylake.

Using the multithread performance as a reference, the i3-7100 gets a score of 126.5 k points while the i5-6400 gets 174.1 k points.

Summarizing, the i5-6400 is 1.4 times faster than the i3-7100. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906e9
506e3
Core
Kaby Lake-S
Skylake-S
Architecture
Base frecuency
3.9 GHz
2.7 GHz
Boost frecuency
3.9 GHz
3.3 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
2/4
4/4
TDP
51 W
65 W
Cache L1 (d+i)
2x32+2x32 kB
4x32+4x32 kB
Cache L2
2x256 kB
4x256 kB
Cache L3
3072 kB
6144 kB
Date
January 2017
September 2015
Mean monothread perf.
58.55k points
48.05k points
Mean multithread perf.
126.47k points
174.05k points

Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
i3-7100
i5-6400
Test#1 (Integers)
4.01k
3.2k (x0.8)
Test#2 (FP)
16.38k
12.81k (x0.78)
Test#3 (Generic, ZIP)
5.31k
4.18k (x0.79)
Test#1 (Memory)
3.98k
4.3k (x1.08)
TOTAL
29.69k
24.49k (x0.82)

Multithread

i3-7100

i5-6400
Test#1 (Integers)
8.1k
11.45k (x1.41)
Test#2 (FP)
38.7k
46.67k (x1.21)
Test#3 (Generic, ZIP)
12.69k
14.69k (x1.16)
Test#1 (Memory)
3.76k
5.92k (x1.58)
TOTAL
63.24k
78.73k (x1.24)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i3-7100
i5-6400
Test#1 (Integers)
14.04k
11.56k (x0.82)
Test#2 (FP)
20.55k
16.53k (x0.8)
Test#3 (Generic, ZIP)
5.41k
4.3k (x0.79)
Test#1 (Memory)
3.99k
3.97k (x0.99)
TOTAL
43.99k
36.36k (x0.83)

Multithread

i3-7100

i5-6400
Test#1 (Integers)
30.09k
43.01k (x1.43)
Test#2 (FP)
47.84k
64.46k (x1.35)
Test#3 (Generic, ZIP)
13.13k
16.14k (x1.23)
Test#1 (Memory)
3.52k
5.91k (x1.68)
TOTAL
94.59k
129.51k (x1.37)

AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
i3-7100
i5-6400
Test#1 (Integers)
14.41k
11.82k (x0.82)
Test#2 (FP)
22.38k
18.36k (x0.82)
Test#3 (Generic, ZIP)
5.45k
4.43k (x0.81)
Test#1 (Memory)
4.96k
4.95k (x1)
TOTAL
47.21k
39.56k (x0.84)

Multithread

i3-7100

i5-6400
Test#1 (Integers)
30.48k
46.04k (x1.51)
Test#2 (FP)
52.08k
69.47k (x1.33)
Test#3 (Generic, ZIP)
12.97k
16.33k (x1.26)
Test#1 (Memory)
4.56k
7.74k (x1.7)
TOTAL
100.1k
139.58k (x1.39)

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
i3-7100
i5-6400
Test#1 (Integers)
25.77k
21.1k (x0.82)
Test#2 (FP)
23.26k
18.28k (x0.79)
Test#3 (Generic, ZIP)
5.43k
4.22k (x0.78)
Test#1 (Memory)
4.09k
4.45k (x1.09)
TOTAL
58.55k
48.05k (x0.82)

Multithread

i3-7100

i5-6400
Test#1 (Integers)
54.98k
80.03k (x1.46)
Test#2 (FP)
54.73k
71.1k (x1.3)
Test#3 (Generic, ZIP)
13.12k
16.19k (x1.23)
Test#1 (Memory)
3.65k
6.73k (x1.85)
TOTAL
126.47k
174.05k (x1.38)

Performance/W
i3-7100
i5-6400
Test#1 (Integers)
1078 points/W
1231 points/W
Test#2 (FP)
1073 points/W
1094 points/W
Test#3 (Generic, ZIP)
257 points/W
249 points/W
Test#1 (Memory)
72 points/W
104 points/W
TOTAL
2480 points/W
2678 points/W

Performance/GHz
i3-7100
i5-6400
Test#1 (Integers)
6607 points/GHz
6394 points/GHz
Test#2 (FP)
5964 points/GHz
5539 points/GHz
Test#3 (Generic, ZIP)
1393 points/GHz
1279 points/GHz
Test#1 (Memory)
1049 points/GHz
1348 points/GHz
TOTAL
15014 points/GHz
14560 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