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Core i3-7100 vs i7-6700K


Description
The i3-7100 is based on Kaby Lake architecture while the i7-6700K is based on Skylake.

Using the multithread performance as a reference, the i3-7100 gets a score of 126.5 k points while the i7-6700K gets 254.6 k points.

Summarizing, the i7-6700K is 2 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
4 GHz
Boost frecuency
3.9 GHz
4.2 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
2/4
4/8
TDP
51 W
95 W
Cache L1 (d+i)
2x32+2x32 kB
4x32+4x32 kB
Cache L2
2x256 kB
256 kB
Cache L3
3072 kB
8192 kB
Date
January 2017
May 2015
Mean monothread perf.
58.55k points
63.22k points
Mean multithread perf.
126.47k points
254.56k 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
i7-6700K
Test#1 (Integers)
4.01k
4.07k (x1.02)
Test#2 (FP)
16.38k
16.62k (x1.01)
Test#3 (Generic, ZIP)
5.31k
5.23k (x0.98)
Test#1 (Memory)
3.98k
6.28k (x1.58)
TOTAL
29.69k
32.2k (x1.08)

Multithread

i3-7100

i7-6700K
Test#1 (Integers)
8.1k
16.37k (x2.02)
Test#2 (FP)
38.7k
77.34k (x2)
Test#3 (Generic, ZIP)
12.69k
25.65k (x2.02)
Test#1 (Memory)
3.76k
10.21k (x2.72)
TOTAL
63.24k
129.57k (x2.05)

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
i7-6700K
Test#1 (Integers)
14.04k
14.73k (x1.05)
Test#2 (FP)
20.55k
21.27k (x1.04)
Test#3 (Generic, ZIP)
5.41k
5.52k (x1.02)
Test#1 (Memory)
3.99k
6.32k (x1.58)
TOTAL
43.99k
47.84k (x1.09)

Multithread

i3-7100

i7-6700K
Test#1 (Integers)
30.09k
61.09k (x2.03)
Test#2 (FP)
47.84k
99.17k (x2.07)
Test#3 (Generic, ZIP)
13.13k
26.57k (x2.02)
Test#1 (Memory)
3.52k
10.26k (x2.92)
TOTAL
94.59k
197.09k (x2.08)

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
i7-6700K
Test#1 (Integers)
25.77k
25.78k (x1)
Test#2 (FP)
23.26k
23.08k (x0.99)
Test#3 (Generic, ZIP)
5.43k
5.32k (x0.98)
Test#1 (Memory)
4.09k
9.03k (x2.21)
TOTAL
58.55k
63.22k (x1.08)

Multithread

i3-7100

i7-6700K
Test#1 (Integers)
54.98k
112.83k (x2.05)
Test#2 (FP)
54.73k
106.86k (x1.95)
Test#3 (Generic, ZIP)
13.12k
25.76k (x1.96)
Test#1 (Memory)
3.65k
9.12k (x2.5)
TOTAL
126.47k
254.56k (x2.01)

Performance/W
i3-7100
i7-6700K
Test#1 (Integers)
1078 points/W
1188 points/W
Test#2 (FP)
1073 points/W
1125 points/W
Test#3 (Generic, ZIP)
257 points/W
271 points/W
Test#1 (Memory)
72 points/W
96 points/W
TOTAL
2480 points/W
2680 points/W

Performance/GHz
i3-7100
i7-6700K
Test#1 (Integers)
6607 points/GHz
6139 points/GHz
Test#2 (FP)
5964 points/GHz
5495 points/GHz
Test#3 (Generic, ZIP)
1393 points/GHz
1268 points/GHz
Test#1 (Memory)
1049 points/GHz
2150 points/GHz
TOTAL
15014 points/GHz
15052 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