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Core i3-6100U vs i5-8400


Description
The i3-6100U is based on Skylake architecture while the i5-8400 is based on Coffee Lake.

Using the multithread performance as a reference, the i3-6100U gets a score of 69.9 k points while the i5-8400 gets 289.6 k points.

Summarizing, the i5-8400 is 4.1 times faster than the i3-6100U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
406e3
906ea
Core
Skylake-U
Coffee Lake-S
Architecture
Base frecuency
2.3 GHz
2.8 GHz
Boost frecuency
2.3 GHz
4 GHz
Socket
BGA1356
LGA 1151
Cores/Threads
2/4
6/6
TDP
15 W
65 W
Cache L1 (d+i)
2x32+2x32 kB
6x32+6x32 kB
Cache L2
2x256 kB
6x256 kB
Cache L3
3072 kB
9216 kB
Date
September 2015
September 2017
Mean monothread perf.
30.73k points
64.98k points
Mean multithread perf.
69.94k points
289.61k 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
i3-6100U
i5-8400
Test#1 (Integers)
2.27k
4.08k (x1.8)
Test#2 (FP)
9.18k
14.96k (x1.63)
Test#3 (Generic, ZIP)
2.97k
4.98k (x1.68)
Test#1 (Memory)
3.79k
10.29k (x2.72)
TOTAL
18.21k
34.31k (x1.88)

Multithread

i3-6100U

i5-8400
Test#1 (Integers)
4.79k
21.54k (x4.5)
Test#2 (FP)
23.04k
85.13k (x3.69)
Test#3 (Generic, ZIP)
7.55k
28.24k (x3.74)
Test#1 (Memory)
3.86k
4.08k (x1.06)
TOTAL
39.24k
139k (x3.54)

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
i3-6100U
i5-8400
Test#1 (Integers)
12.55k
26.5k (x2.11)
Test#2 (FP)
12.19k
23.11k (x1.9)
Test#3 (Generic, ZIP)
2.81k
5.2k (x1.85)
Test#1 (Memory)
3.18k
10.16k (x3.2)
TOTAL
30.73k
64.98k (x2.11)

Multithread

i3-6100U

i5-8400
Test#1 (Integers)
29.33k
135.08k (x4.6)
Test#2 (FP)
28.81k
121.49k (x4.22)
Test#3 (Generic, ZIP)
6.46k
27.53k (x4.26)
Test#1 (Memory)
5.33k
5.5k (x1.03)
TOTAL
69.94k
289.61k (x4.14)

Performance/W
i3-6100U
i5-8400
Test#1 (Integers)
1956 points/W
2078 points/W
Test#2 (FP)
1921 points/W
1869 points/W
Test#3 (Generic, ZIP)
431 points/W
424 points/W
Test#1 (Memory)
356 points/W
85 points/W
TOTAL
4663 points/W
4455 points/W

Performance/GHz
i3-6100U
i5-8400
Test#1 (Integers)
5459 points/GHz
6626 points/GHz
Test#2 (FP)
5302 points/GHz
5778 points/GHz
Test#3 (Generic, ZIP)
1220 points/GHz
1300 points/GHz
Test#1 (Memory)
1382 points/GHz
2541 points/GHz
TOTAL
13362 points/GHz
16245 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