Core i7-6600U vs i5-6400
Description
Both models i7-6600U and i5-6400 are based on Skylake architecture.
Sky Lake is also known as 6th generation Core. Include Thunderbolt 3.0, SATA Express and Iris Pro graphics with DirectX 12. It uses LGA 1151 socket for mainstream models and LGA 2066 for X-Series. Sky Lake comes with AVX2 support in all mainstreams CPUs and AVX-512 in some high end models.
Using the multithread performance as a reference, the i7-6600U gets a score of 79.2 k points while the i5-6400 gets 174.1 k points.
Summarizing, the i5-6400 is 2.2 times faster than the i7-6600U. To get a proper comparison between both models, take a look to the data shown below.
Sky Lake is also known as 6th generation Core. Include Thunderbolt 3.0, SATA Express and Iris Pro graphics with DirectX 12. It uses LGA 1151 socket for mainstream models and LGA 2066 for X-Series. Sky Lake comes with AVX2 support in all mainstreams CPUs and AVX-512 in some high end models.
Using the multithread performance as a reference, the i7-6600U gets a score of 79.2 k points while the i5-6400 gets 174.1 k points.
Summarizing, the i5-6400 is 2.2 times faster than the i7-6600U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
406e3
506e3
Core
Skylake-U
Skylake-S
Base frecuency
2.6 GHz
2.7 GHz
Boost frecuency
3.4 GHz
3.3 GHz
Socket
BGA1356
LGA 1151
Cores/Threads
2/4
4/4
TDP
15 W
65 W
Cache L1 (d+i)
2x32+2x32 kB
4x32+4x32 kB
Cache L2
2x256 kB
4x256 kB
Cache L3
4096 kB
6144 kB
Date
September 2015
September 2015
Mean monothread perf.
39.73k points
48.05k points
Mean multithread perf.
79.22k 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
i7-6600U
i5-6400
Test#1 (Integers)
2.75k
3.2k (x1.16)
Test#2 (FP)
12.23k
12.81k (x1.05)
Test#3 (Generic, ZIP)
3.9k
4.18k (x1.07)
Test#1 (Memory)
5.61k
4.3k (x0.77)
TOTAL
24.48k
24.49k (x1)
Multithread
i7-6600U
i5-6400
Test#1 (Integers)
5.23k
11.45k (x2.19)
Test#2 (FP)
25k
46.67k (x1.87)
Test#3 (Generic, ZIP)
8.98k
14.69k (x1.64)
Test#1 (Memory)
4.73k
5.92k (x1.25)
TOTAL
43.95k
78.73k (x1.79)
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
i7-6600U
i5-6400
Test#1 (Integers)
6.76k
11.56k (x1.71)
Test#2 (FP)
9.58k
16.53k (x1.73)
Test#3 (Generic, ZIP)
2.46k
4.3k (x1.74)
Test#1 (Memory)
4.18k
3.97k (x0.95)
TOTAL
22.99k
36.36k (x1.58)
Multithread
i7-6600U
i5-6400
Test#1 (Integers)
14.37k
43.01k (x2.99)
Test#2 (FP)
23.79k
64.46k (x2.71)
Test#3 (Generic, ZIP)
5.71k
16.14k (x2.83)
Test#1 (Memory)
4.29k
5.91k (x1.38)
TOTAL
48.16k
129.51k (x2.69)
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
i7-6600U
i5-6400
Test#1 (Integers)
8.49k
11.82k (x1.39)
Test#2 (FP)
10.92k
18.36k (x1.68)
Test#3 (Generic, ZIP)
2.76k
4.43k (x1.6)
Test#1 (Memory)
4.93k
4.95k (x1)
TOTAL
27.1k
39.56k (x1.46)
Multithread
i7-6600U
i5-6400
Test#1 (Integers)
14.11k
46.04k (x3.26)
Test#2 (FP)
20.05k
69.47k (x3.46)
Test#3 (Generic, ZIP)
6.17k
16.33k (x2.65)
Test#1 (Memory)
4.73k
7.74k (x1.64)
TOTAL
45.05k
139.58k (x3.1)
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
i7-6600U
i5-6400
Test#1 (Integers)
16.72k
21.1k (x1.26)
Test#2 (FP)
14.7k
18.28k (x1.24)
Test#3 (Generic, ZIP)
3.4k
4.22k (x1.24)
Test#1 (Memory)
4.9k
4.45k (x0.91)
TOTAL
39.73k
48.05k (x1.21)
Multithread
i7-6600U
i5-6400
Test#1 (Integers)
33.41k
80.03k (x2.4)
Test#2 (FP)
31.66k
71.1k (x2.25)
Test#3 (Generic, ZIP)
8.18k
16.19k (x1.98)
Test#1 (Memory)
5.97k
6.73k (x1.13)
TOTAL
79.22k
174.05k (x2.2)
Performance/W
i7-6600U
i5-6400
Test#1 (Integers)
2227 points/W
1231 points/W
Test#2 (FP)
2111 points/W
1094 points/W
Test#3 (Generic, ZIP)
546 points/W
249 points/W
Test#1 (Memory)
398 points/W
104 points/W
TOTAL
5282 points/W
2678 points/W
Performance/GHz
i7-6600U
i5-6400
Test#1 (Integers)
4919 points/GHz
6394 points/GHz
Test#2 (FP)
4325 points/GHz
5539 points/GHz
Test#3 (Generic, ZIP)
999 points/GHz
1279 points/GHz
Test#1 (Memory)
1441 points/GHz
1348 points/GHz
TOTAL
11684 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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4