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Core i7-7500U vs i7-6700K


Description
The i7-7500U is based on Kaby Lake architecture while the i7-6700K is based on Skylake.

Using the multithread performance as a reference, the i7-7500U gets a score of 86.9 k points while the i7-6700K gets 254.6 k points.

Summarizing, the i7-6700K is 2.9 times faster than the i7-7500U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806e9
506e3
Core
Kaby Lake-U
Skylake-S
Architecture
Base frecuency
2.7 GHz
4 GHz
Boost frecuency
3.5 GHz
4.2 GHz
Socket
BGA1356
LGA 1151
Cores/Threads
2/4
4/8
TDP
15 W
95 W
Cache L1 (d+i)
2x32+2x32 kB
4x32+4x32 kB
Cache L2
2x256 kB
256 kB
Cache L3
4096 kB
8192 kB
Date
August 2016
May 2015
Mean monothread perf.
48.67k points
63.22k points
Mean multithread perf.
86.94k 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
i7-7500U
i7-6700K
Test#1 (Integers)
3.53k
4.07k (x1.16)
Test#2 (FP)
14.67k
16.62k (x1.13)
Test#3 (Generic, ZIP)
4.84k
5.23k (x1.08)
Test#1 (Memory)
6.26k
6.28k (x1)
TOTAL
29.29k
32.2k (x1.1)

Multithread

i7-7500U

i7-6700K
Test#1 (Integers)
7.26k
16.37k (x2.25)
Test#2 (FP)
35.04k
77.34k (x2.21)
Test#3 (Generic, ZIP)
11.28k
25.65k (x2.28)
Test#1 (Memory)
5.69k
10.21k (x1.79)
TOTAL
59.27k
129.57k (x2.19)

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
i7-7500U
i7-6700K
Test#1 (Integers)
12.93k
14.73k (x1.14)
Test#2 (FP)
18.63k
21.27k (x1.14)
Test#3 (Generic, ZIP)
5.03k
5.52k (x1.1)
Test#1 (Memory)
6.16k
6.32k (x1.03)
TOTAL
42.75k
47.84k (x1.12)

Multithread

i7-7500U

i7-6700K
Test#1 (Integers)
27.13k
61.09k (x2.25)
Test#2 (FP)
43.19k
99.17k (x2.3)
Test#3 (Generic, ZIP)
11.7k
26.57k (x2.27)
Test#1 (Memory)
4.99k
10.26k (x2.06)
TOTAL
87.02k
197.09k (x2.26)

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
i7-7500U
i7-6700K
Test#1 (Integers)
20.74k
25.78k (x1.24)
Test#2 (FP)
18.41k
23.08k (x1.25)
Test#3 (Generic, ZIP)
3.98k
5.32k (x1.34)
Test#1 (Memory)
5.54k
9.03k (x1.63)
TOTAL
48.67k
63.22k (x1.3)

Multithread

i7-7500U

i7-6700K
Test#1 (Integers)
37.34k
112.83k (x3.02)
Test#2 (FP)
35.79k
106.86k (x2.99)
Test#3 (Generic, ZIP)
8.34k
25.76k (x3.09)
Test#1 (Memory)
5.48k
9.12k (x1.66)
TOTAL
86.94k
254.56k (x2.93)

Performance/W
i7-7500U
i7-6700K
Test#1 (Integers)
2489 points/W
1188 points/W
Test#2 (FP)
2386 points/W
1125 points/W
Test#3 (Generic, ZIP)
556 points/W
271 points/W
Test#1 (Memory)
365 points/W
96 points/W
TOTAL
5796 points/W
2680 points/W

Performance/GHz
i7-7500U
i7-6700K
Test#1 (Integers)
5926 points/GHz
6139 points/GHz
Test#2 (FP)
5260 points/GHz
5495 points/GHz
Test#3 (Generic, ZIP)
1137 points/GHz
1268 points/GHz
Test#1 (Memory)
1584 points/GHz
2150 points/GHz
TOTAL
13907 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