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Core i5-10400T vs i7-6700K


Description
The i5-10400T is based on Comet Lake architecture while the i7-6700K is based on Skylake.

Using the multithread performance as a reference, the i5-10400T gets a score of 307.2 k points while the i7-6700K gets 254.6 k points.

Summarizing, the i5-10400T is 1.2 times faster than the i7-6700K . 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
4 GHz
Boost frecuency
3.6 GHz
4.2 GHz
Socket
FC-LGA 1200
LGA 1151
Cores/Threads
6/12
4/8
TDP
35 W
95 W
Cache L1 (d+i)
6x32+6x32 kB
32+32 kB
Cache L2
6x256 kB
256 kB
Cache L3
12288 kB
8192 kB
Date
April 2020
May 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
i7-6700K
Test#1 (Integers)
4004
4072 (1.70%)
Test#2 (FP)
14189
16620 (17.13%)
Test#3 (Generic, ZIP)
4620
5225 (13.11%)
Test#1 (Memory)
11029
6279 (-43.07%)
TOTAL
33842
32196 (-4.87%)

Multithread

i5-10400T

i7-6700K
Test#1 (Integers)
22767
16366 (-28.12%)
Test#2 (FP)
96586
77341 (-19.92%)
Test#3 (Generic, ZIP)
31652
25654 (-18.95%)
Test#1 (Memory)
2451
10206 (316.41%)
TOTAL
153456
129568 (-15.57%)

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
i7-6700K
Test#1 (Integers)
12610
14733 (16.83%)
Test#2 (FP)
17941
21273 (18.57%)
Test#3 (Generic, ZIP)
4828
5516 (14.25%)
Test#1 (Memory)
10811
6320 (-41.55%)
TOTAL
46191
47841 (3.57%)

Multithread

i5-10400T

i7-6700K
Test#1 (Integers)
74617
61093 (-18.13%)
Test#2 (FP)
119634
99165 (-17.11%)
Test#3 (Generic, ZIP)
32645
26574 (-18.60%)
Test#1 (Memory)
2520
10257 (307.06%)
TOTAL
229416
197089 (-14.09%)

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
i7-6700K
Test#1 (Integers)
21999
25782 (17.20%)
Test#2 (FP)
19977
23081 (15.54%)
Test#3 (Generic, ZIP)
4566
5325 (16.62%)
Test#1 (Memory)
11306
9031 (-20.12%)
TOTAL
57847
63219 (9.29%)

Multithread

i5-10400T

i7-6700K
Test#1 (Integers)
136687
112827 (-17.46%)
Test#2 (FP)
135254
106861 (-20.99%)
Test#3 (Generic, ZIP)
32756
25758 (-21.36%)
Test#1 (Memory)
2478
9116 (267.85%)
TOTAL
307175
254562 (-17.13%)

Performance/W
i5-10400T
i7-6700K
Test#1 (Integers)
3905 points/W
1188 points/W
Test#2 (FP)
3864 points/W
1125 points/W
Test#3 (Generic, ZIP)
936 points/W
271 points/W
Test#1 (Memory)
71 points/W
96 points/W
TOTAL
8776 points/W
2680 points/W

Performance/GHz
i5-10400T
i7-6700K
Test#1 (Integers)
6111 points/GHz
6139 points/GHz
Test#2 (FP)
5549 points/GHz
5495 points/GHz
Test#3 (Generic, ZIP)
1268 points/GHz
1268 points/GHz
Test#1 (Memory)
3141 points/GHz
2150 points/GHz
TOTAL
16069 points/GHz
15052 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