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Core i5-10400 vs i5-8400


Description
The i5-10400 is based on Comet Lake architecture while the i5-8400 is based on Coffee Lake.

Using the multithread performance as a reference, the i5-10400 gets a score of 372.2 k points while the i5-8400 gets 289.6 k points.

Summarizing, the i5-10400 is 1.3 times faster than the i5-8400. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
a0655
906ea
Core
Comet Lake-S
Coffee Lake-S
Architecture
Base frecuency
2.9 GHz
2.8 GHz
Boost frecuency
4.3 GHz
4 GHz
Socket
LGA 1200
LGA 1151
Cores/Threads
6/12
6/6
TDP
65 W
65 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
12288 kB
9216 kB
Date
April 2020
September 2017
Mean monothread perf.
68.04k points
64.98k points
Mean multithread perf.
372.19k points
289.61k points

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
i5-10400
i5-8400
Test#1 (Integers)
26.43k
26.5k (x1)
Test#2 (FP)
23.89k
23.11k (x0.97)
Test#3 (Generic, ZIP)
5.63k
5.2k (x0.92)
Test#1 (Memory)
12.1k
10.16k (x0.84)
TOTAL
68.04k
64.98k (x0.95)

Multithread

i5-10400

i5-8400
Test#1 (Integers)
163.14k
135.08k (x0.83)
Test#2 (FP)
161.5k
121.49k (x0.75)
Test#3 (Generic, ZIP)
39.94k
27.53k (x0.69)
Test#1 (Memory)
7.6k
5.5k (x0.72)
TOTAL
372.19k
289.61k (x0.78)

Performance/W
i5-10400
i5-8400
Test#1 (Integers)
2510 points/W
2078 points/W
Test#2 (FP)
2485 points/W
1869 points/W
Test#3 (Generic, ZIP)
615 points/W
424 points/W
Test#1 (Memory)
117 points/W
85 points/W
TOTAL
5726 points/W
4455 points/W

Performance/GHz
i5-10400
i5-8400
Test#1 (Integers)
6146 points/GHz
6626 points/GHz
Test#2 (FP)
5555 points/GHz
5778 points/GHz
Test#3 (Generic, ZIP)
1309 points/GHz
1300 points/GHz
Test#1 (Memory)
2814 points/GHz
2541 points/GHz
TOTAL
15824 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