Core i5-6400 vs i7-6500U
Description
Both models i5-6400 and i7-6500U 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 i5-6400 gets a score of 174.1 k points while the i7-6500U gets 97.5 k points.
Summarizing, the i5-6400 is 1.8 times faster than the i7-6500U. 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 i5-6400 gets a score of 174.1 k points while the i7-6500U gets 97.5 k points.
Summarizing, the i5-6400 is 1.8 times faster than the i7-6500U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
506e3
406e3
Core
Skylake-S
Skylake-U
Base frecuency
2.7 GHz
2.5 GHz
Boost frecuency
3.3 GHz
3.1 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
4096 kB
Cache L3
6144 kB
kB
Date
September 2015
September 2015
Mean monothread perf.
48.05k points
46.25k points
Mean multithread perf.
174.05k points
97.52k 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
i7-6500U
Test#1 (Integers)
3.2k
2.98k (x0.93)
Test#2 (FP)
12.81k
12.19k (x0.95)
Test#3 (Generic, ZIP)
4.18k
3.91k (x0.94)
Test#1 (Memory)
4.3k
5.3k (x1.23)
TOTAL
24.49k
24.37k (x1)
Multithread
i5-6400
i7-6500U
Test#1 (Integers)
11.45k
6.1k (x0.53)
Test#2 (FP)
46.67k
28.73k (x0.62)
Test#3 (Generic, ZIP)
14.69k
9.56k (x0.65)
Test#1 (Memory)
5.92k
6.71k (x1.13)
TOTAL
78.73k
51.09k (x0.65)
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
i7-6500U
Test#1 (Integers)
11.56k
11.11k (x0.96)
Test#2 (FP)
16.53k
15.97k (x0.97)
Test#3 (Generic, ZIP)
4.3k
4.25k (x0.99)
Test#1 (Memory)
3.97k
5.66k (x1.43)
TOTAL
36.36k
36.99k (x1.02)
Multithread
i5-6400
i7-6500U
Test#1 (Integers)
43.01k
23.1k (x0.54)
Test#2 (FP)
64.46k
36.73k (x0.57)
Test#3 (Generic, ZIP)
16.14k
9.99k (x0.62)
Test#1 (Memory)
5.91k
7k (x1.19)
TOTAL
129.51k
76.82k (x0.59)
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
i7-6500U
Test#1 (Integers)
11.82k
11.09k (x0.94)
Test#2 (FP)
18.36k
17.1k (x0.93)
Test#3 (Generic, ZIP)
4.43k
4.12k (x0.93)
Test#1 (Memory)
4.95k
5.58k (x1.13)
TOTAL
39.56k
37.9k (x0.96)
Multithread
i5-6400
i7-6500U
Test#1 (Integers)
46.04k
23.3k (x0.51)
Test#2 (FP)
69.47k
38.52k (x0.55)
Test#3 (Generic, ZIP)
16.33k
9.95k (x0.61)
Test#1 (Memory)
7.74k
6.95k (x0.9)
TOTAL
139.58k
78.72k (x0.56)
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
i7-6500U
Test#1 (Integers)
21.1k
19.47k (x0.92)
Test#2 (FP)
18.28k
17.58k (x0.96)
Test#3 (Generic, ZIP)
4.22k
4.05k (x0.96)
Test#1 (Memory)
4.45k
5.15k (x1.16)
TOTAL
48.05k
46.25k (x0.96)
Multithread
i5-6400
i7-6500U
Test#1 (Integers)
80.03k
42.05k (x0.53)
Test#2 (FP)
71.1k
40.2k (x0.57)
Test#3 (Generic, ZIP)
16.19k
9.4k (x0.58)
Test#1 (Memory)
6.73k
5.86k (x0.87)
TOTAL
174.05k
97.52k (x0.56)
Performance/W
i5-6400
i7-6500U
Test#1 (Integers)
1231 points/W
2803 points/W
Test#2 (FP)
1094 points/W
2680 points/W
Test#3 (Generic, ZIP)
249 points/W
626 points/W
Test#1 (Memory)
104 points/W
391 points/W
TOTAL
2678 points/W
6501 points/W
Performance/GHz
i5-6400
i7-6500U
Test#1 (Integers)
6394 points/GHz
6279 points/GHz
Test#2 (FP)
5539 points/GHz
5672 points/GHz
Test#3 (Generic, ZIP)
1279 points/GHz
1305 points/GHz
Test#1 (Memory)
1348 points/GHz
1662 points/GHz
TOTAL
14560 points/GHz
14918 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