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Core i5-6400 vs i7-7500U


Description
The i5-6400 is based on Skylake architecture while the i7-7500U is based on Kaby Lake.

Using the multithread performance as a reference, the i5-6400 gets a score of 174.1 k points while the i7-7500U gets 86.9 k points.

Summarizing, the i5-6400 is 2 times faster than the i7-7500U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
806e9
Core
Skylake-S
Kaby Lake-U
Architecture
Base frecuency
2.7 GHz
2.7 GHz
Boost frecuency
3.3 GHz
3.5 GHz
Socket
LGA 1151
BGA1356
Cores/Threads
4/4
2/4
TDP
65 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
2x32+2x32 kB
Cache L2
4x256 kB
2x256 kB
Cache L3
6144 kB
4096 kB
Date
September 2015
August 2016
Mean monothread perf.
48.05k points
48.67k points
Mean multithread perf.
174.05k points
86.94k 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
i5-6400
i7-7500U
Test#1 (Integers)
3.2k
3.53k (x1.1)
Test#2 (FP)
12.81k
14.67k (x1.15)
Test#3 (Generic, ZIP)
4.18k
4.84k (x1.16)
Test#1 (Memory)
4.3k
6.26k (x1.45)
TOTAL
24.49k
29.29k (x1.2)

Multithread

i5-6400

i7-7500U
Test#1 (Integers)
11.45k
7.26k (x0.63)
Test#2 (FP)
46.67k
35.04k (x0.75)
Test#3 (Generic, ZIP)
14.69k
11.28k (x0.77)
Test#1 (Memory)
5.92k
5.69k (x0.96)
TOTAL
78.73k
59.27k (x0.75)

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
i5-6400
i7-7500U
Test#1 (Integers)
11.56k
12.93k (x1.12)
Test#2 (FP)
16.53k
18.63k (x1.13)
Test#3 (Generic, ZIP)
4.3k
5.03k (x1.17)
Test#1 (Memory)
3.97k
6.16k (x1.55)
TOTAL
36.36k
42.75k (x1.18)

Multithread

i5-6400

i7-7500U
Test#1 (Integers)
43.01k
27.13k (x0.63)
Test#2 (FP)
64.46k
43.19k (x0.67)
Test#3 (Generic, ZIP)
16.14k
11.7k (x0.72)
Test#1 (Memory)
5.91k
4.99k (x0.84)
TOTAL
129.51k
87.02k (x0.67)

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
i5-6400
i7-7500U
Test#1 (Integers)
11.82k
12.71k (x1.07)
Test#2 (FP)
18.36k
18.61k (x1.01)
Test#3 (Generic, ZIP)
4.43k
4.78k (x1.08)
Test#1 (Memory)
4.95k
6.63k (x1.34)
TOTAL
39.56k
42.72k (x1.08)

Multithread

i5-6400

i7-7500U
Test#1 (Integers)
46.04k
27.27k (x0.59)
Test#2 (FP)
69.47k
44.7k (x0.64)
Test#3 (Generic, ZIP)
16.33k
11.33k (x0.69)
Test#1 (Memory)
7.74k
5.55k (x0.72)
TOTAL
139.58k
88.86k (x0.64)

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
i5-6400
i7-7500U
Test#1 (Integers)
21.1k
20.74k (x0.98)
Test#2 (FP)
18.28k
18.41k (x1.01)
Test#3 (Generic, ZIP)
4.22k
3.98k (x0.94)
Test#1 (Memory)
4.45k
5.54k (x1.25)
TOTAL
48.05k
48.67k (x1.01)

Multithread

i5-6400

i7-7500U
Test#1 (Integers)
80.03k
37.34k (x0.47)
Test#2 (FP)
71.1k
35.79k (x0.5)
Test#3 (Generic, ZIP)
16.19k
8.34k (x0.51)
Test#1 (Memory)
6.73k
5.48k (x0.81)
TOTAL
174.05k
86.94k (x0.5)

Performance/W
i5-6400
i7-7500U
Test#1 (Integers)
1231 points/W
2489 points/W
Test#2 (FP)
1094 points/W
2386 points/W
Test#3 (Generic, ZIP)
249 points/W
556 points/W
Test#1 (Memory)
104 points/W
365 points/W
TOTAL
2678 points/W
5796 points/W

Performance/GHz
i5-6400
i7-7500U
Test#1 (Integers)
6394 points/GHz
5926 points/GHz
Test#2 (FP)
5539 points/GHz
5260 points/GHz
Test#3 (Generic, ZIP)
1279 points/GHz
1137 points/GHz
Test#1 (Memory)
1348 points/GHz
1584 points/GHz
TOTAL
14560 points/GHz
13907 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