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Core i5-10400T vs i5-6400


Description
The i5-10400T is based on Comet Lake architecture while the i5-6400 is based on Skylake.

Using the multithread performance as a reference, the i5-10400T gets a score of 307.2 k points while the i5-6400 gets 176.7 k points.

Summarizing, the i5-10400T is 1.7 times faster than the i5-6400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
a0653
506e3
Core
Comet Lake-S
Skylake-S
Architecture
Base frecuency
2 GHz
2.7 GHz
Boost frecuency
3.6 GHz
3.3 GHz
Socket
FC-LGA 1200
LGA 1151
Cores/Threads
6/12
4/4
TDP
35 W
65 W
Cache L1 (d+i)
6x32+6x32 kB
4x32+4x32 kB
Cache L2
6x256 kB
4x256 kB
Cache L3
12288 kB
6144 kB
Date
April 2020
September 2015

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
i5-10400T
i5-6400
Test#1 (Integers)
4004
3185 (-20.46%)
Test#2 (FP)
14189
12581 (-11.33%)
Test#3 (Generic, ZIP)
4620
4105 (-11.14%)
Test#1 (Memory)
11029
3934 (-64.33%)
TOTAL
33842
23805 (-29.66%)

Multithread

i5-10400T

i5-6400
Test#1 (Integers)
22767
10777 (-52.66%)
Test#2 (FP)
96586
44113 (-54.33%)
Test#3 (Generic, ZIP)
31652
13887 (-56.13%)
Test#1 (Memory)
2451
7829 (219.42%)
TOTAL
153456
76606 (-50.08%)

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
i5-10400T
i5-6400
Test#1 (Integers)
12610
11411 (-9.51%)
Test#2 (FP)
17941
16352 (-8.86%)
Test#3 (Generic, ZIP)
4828
4146 (-14.13%)
Test#1 (Memory)
10811
3277 (-69.69%)
TOTAL
46191
35186 (-23.82%)

Multithread

i5-10400T

i5-6400
Test#1 (Integers)
74617
41474 (-44.42%)
Test#2 (FP)
119634
65462 (-45.28%)
Test#3 (Generic, ZIP)
32645
16202 (-50.37%)
Test#1 (Memory)
2520
7660 (203.99%)
TOTAL
229416
130798 (-42.99%)

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
i5-10400T
i5-6400
Test#1 (Integers)
12498
11824 (-5.39%)
Test#2 (FP)
19053
18358 (-3.65%)
Test#3 (Generic, ZIP)
4722
4426 (-6.28%)
Test#1 (Memory)
10297
4950 (-51.93%)
TOTAL
46570
39558 (-15.06%)

Multithread

i5-10400T

i5-6400
Test#1 (Integers)
74581
46044 (-38.26%)
Test#2 (FP)
126959
69468 (-45.28%)
Test#3 (Generic, ZIP)
31762
16330 (-48.59%)
Test#1 (Memory)
2497
7742 (210.04%)
TOTAL
235799
139584 (-40.80%)

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
i5-10400T
i5-6400
Test#1 (Integers)
21999
21213 (-3.57%)
Test#2 (FP)
19977
18149 (-9.15%)
Test#3 (Generic, ZIP)
4566
4213 (-7.73%)
Test#1 (Memory)
11306
4304 (-61.93%)
TOTAL
57847
47879 (-17.23%)

Multithread

i5-10400T

i5-6400
Test#1 (Integers)
136687
80359 (-41.21%)
Test#2 (FP)
135254
71943 (-46.81%)
Test#3 (Generic, ZIP)
32756
16375 (-50.01%)
Test#1 (Memory)
2478
8054 (225.00%)
TOTAL
307175
176731 (-42.47%)

Performance/W
i5-10400T
i5-6400
Test#1 (Integers)
3905 points/W
1236 points/W
Test#2 (FP)
3864 points/W
1107 points/W
Test#3 (Generic, ZIP)
936 points/W
252 points/W
Test#1 (Memory)
71 points/W
124 points/W
TOTAL
8776 points/W
2719 points/W

Performance/GHz
i5-10400T
i5-6400
Test#1 (Integers)
6111 points/GHz
6428 points/GHz
Test#2 (FP)
5549 points/GHz
5500 points/GHz
Test#3 (Generic, ZIP)
1268 points/GHz
1277 points/GHz
Test#1 (Memory)
3141 points/GHz
1304 points/GHz
TOTAL
16069 points/GHz
14509 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. 3.7.9