Core i5-6400 vs i5-8250U
Description
The i5-6400 is based on Skylake architecture while the i5-8250U 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 i5-8250U gets 161.3 k points.
Summarizing, the i5-6400 is 1.1 times faster than the i5-8250U. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i5-6400 gets a score of 174.1 k points while the i5-8250U gets 161.3 k points.
Summarizing, the i5-6400 is 1.1 times faster than the i5-8250U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
506e3
806ea
Core
Skylake-S
Kaby Lake-R
Base frecuency
2.7 GHz
1.6 GHz
Boost frecuency
3.3 GHz
3.4 GHz
Socket
LGA 1151
BGA1356
Cores/Threads
4/4
4/8
TDP
65 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
6144 kB
6144 kB
Date
September 2015
August 2017
Mean monothread perf.
48.05k points
54.31k points
Mean multithread perf.
174.05k points
161.26k 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
i5-8250U
Test#1 (Integers)
3.2k
3.32k (x1.04)
Test#2 (FP)
12.81k
13.5k (x1.05)
Test#3 (Generic, ZIP)
4.18k
4.11k (x0.98)
Test#1 (Memory)
4.3k
7.42k (x1.72)
TOTAL
24.49k
28.34k (x1.16)
Multithread
i5-6400
i5-8250U
Test#1 (Integers)
11.45k
13.97k (x1.22)
Test#2 (FP)
46.67k
50.8k (x1.09)
Test#3 (Generic, ZIP)
14.69k
14.71k (x1)
Test#1 (Memory)
5.92k
4.76k (x0.8)
TOTAL
78.73k
84.24k (x1.07)
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
i5-8250U
Test#1 (Integers)
11.56k
12.41k (x1.07)
Test#2 (FP)
16.53k
18.11k (x1.1)
Test#3 (Generic, ZIP)
4.3k
4.79k (x1.11)
Test#1 (Memory)
3.97k
8.16k (x2.05)
TOTAL
36.36k
43.46k (x1.2)
Multithread
i5-6400
i5-8250U
Test#1 (Integers)
43.01k
42.48k (x0.99)
Test#2 (FP)
64.46k
60.2k (x0.93)
Test#3 (Generic, ZIP)
16.14k
14.85k (x0.92)
Test#1 (Memory)
5.91k
4.77k (x0.81)
TOTAL
129.51k
122.3k (x0.94)
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
i5-8250U
Test#1 (Integers)
11.82k
12.59k (x1.06)
Test#2 (FP)
18.36k
18.89k (x1.03)
Test#3 (Generic, ZIP)
4.43k
4.65k (x1.05)
Test#1 (Memory)
4.95k
8.2k (x1.66)
TOTAL
39.56k
44.32k (x1.12)
Multithread
i5-6400
i5-8250U
Test#1 (Integers)
46.04k
45.91k (x1)
Test#2 (FP)
69.47k
69.55k (x1)
Test#3 (Generic, ZIP)
16.33k
16.79k (x1.03)
Test#1 (Memory)
7.74k
4.83k (x0.62)
TOTAL
139.58k
137.09k (x0.98)
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
i5-8250U
Test#1 (Integers)
21.1k
22.11k (x1.05)
Test#2 (FP)
18.28k
19.64k (x1.07)
Test#3 (Generic, ZIP)
4.22k
4.54k (x1.07)
Test#1 (Memory)
4.45k
8.03k (x1.8)
TOTAL
48.05k
54.31k (x1.13)
Multithread
i5-6400
i5-8250U
Test#1 (Integers)
80.03k
74.19k (x0.93)
Test#2 (FP)
71.1k
66.27k (x0.93)
Test#3 (Generic, ZIP)
16.19k
15.97k (x0.99)
Test#1 (Memory)
6.73k
4.83k (x0.72)
TOTAL
174.05k
161.26k (x0.93)
Performance/W
i5-6400
i5-8250U
Test#1 (Integers)
1231 points/W
4946 points/W
Test#2 (FP)
1094 points/W
4418 points/W
Test#3 (Generic, ZIP)
249 points/W
1065 points/W
Test#1 (Memory)
104 points/W
322 points/W
TOTAL
2678 points/W
10751 points/W
Performance/GHz
i5-6400
i5-8250U
Test#1 (Integers)
6394 points/GHz
6503 points/GHz
Test#2 (FP)
5539 points/GHz
5777 points/GHz
Test#3 (Generic, ZIP)
1279 points/GHz
1334 points/GHz
Test#1 (Memory)
1348 points/GHz
2361 points/GHz
TOTAL
14560 points/GHz
15975 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