Core i5-8400 vs i5-1235U
Description
The i5-8400 is based on Coffee Lake architecture while the i5-1235U is based on Alder Lake.
Using the multithread performance as a reference, the i5-8400 gets a score of 289.6 k points while the i5-1235U gets 297.5 k points.
Summarizing, the i5-1235U is 1 times faster than the i5-8400. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i5-8400 gets a score of 289.6 k points while the i5-1235U gets 297.5 k points.
Summarizing, the i5-1235U is 1 times faster than the i5-8400. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
906ea
906a4
Core
Coffee Lake-S
Alder Lake-U
Base frecuency
2.8 GHz
3.3 GHz
Boost frecuency
4 GHz
4.4 GHz
Socket
LGA 1151
BGA 1700
Cores/Threads
6/6
10/12
TDP
65 W
15 W
Cache L1 (d+i)
6x32+6x32 kB
2x32/8x64+2x48/8x32 kB
Cache L2
6x256 kB
1x1280+4x2048 kB
Cache L3
9216 kB
12288 kB
Date
September 2017
April 2022
Mean monothread perf.
64.98k points
81.64k points
Mean multithread perf.
289.61k points
297.46k 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
i5-8400
i5-1235U
Test#1 (Integers)
4.08k
7.33k (x1.8)
Test#2 (FP)
14.96k
18.27k (x1.22)
Test#3 (Generic, ZIP)
4.98k
12.8k (x2.57)
Test#1 (Memory)
10.29k
13.2k (x1.28)
TOTAL
34.31k
51.61k (x1.5)
Multithread
i5-8400
i5-1235U
Test#1 (Integers)
21.54k
29.24k (x1.36)
Test#2 (FP)
85.13k
83.32k (x0.98)
Test#3 (Generic, ZIP)
28.24k
54.53k (x1.93)
Test#1 (Memory)
4.08k
4.99k (x1.22)
TOTAL
139k
172.07k (x1.24)
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
i5-8400
i5-1235U
Test#1 (Integers)
26.5k
36.73k (x1.39)
Test#2 (FP)
23.11k
22.09k (x0.96)
Test#3 (Generic, ZIP)
5.2k
11.24k (x2.16)
Test#1 (Memory)
10.16k
11.58k (x1.14)
TOTAL
64.98k
81.64k (x1.26)
Multithread
i5-8400
i5-1235U
Test#1 (Integers)
135.08k
130.18k (x0.96)
Test#2 (FP)
121.49k
110.21k (x0.91)
Test#3 (Generic, ZIP)
27.53k
50.76k (x1.84)
Test#1 (Memory)
5.5k
6.31k (x1.15)
TOTAL
289.61k
297.46k (x1.03)
Performance/W
i5-8400
i5-1235U
Test#1 (Integers)
2078 points/W
8679 points/W
Test#2 (FP)
1869 points/W
7348 points/W
Test#3 (Generic, ZIP)
424 points/W
3384 points/W
Test#1 (Memory)
85 points/W
421 points/W
TOTAL
4455 points/W
19831 points/W
Performance/GHz
i5-8400
i5-1235U
Test#1 (Integers)
6626 points/GHz
8349 points/GHz
Test#2 (FP)
5778 points/GHz
5020 points/GHz
Test#3 (Generic, ZIP)
1300 points/GHz
2555 points/GHz
Test#1 (Memory)
2541 points/GHz
2631 points/GHz
TOTAL
16245 points/GHz
18555 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