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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
4x32+4x32 kB
Cache L2
6x256 kB
256 kB
Cache L3
12288 kB
8192 kB
Date
April 2020
May 2015
Mean monothread perf.
57.85k points
63.22k points
Mean multithread perf.
307.18k points
254.56k 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
i5-10400T
i7-6700K
Test#1 (Integers)
4k
4.07k (x1.02)
Test#2 (FP)
14.19k
16.62k (x1.17)
Test#3 (Generic, ZIP)
4.62k
5.23k (x1.13)
Test#1 (Memory)
11.03k
6.28k (x0.57)
TOTAL
33.84k
32.2k (x0.95)

Multithread

i5-10400T

i7-6700K
Test#1 (Integers)
22.77k
16.37k (x0.72)
Test#2 (FP)
96.59k
77.34k (x0.8)
Test#3 (Generic, ZIP)
31.65k
25.65k (x0.81)
Test#1 (Memory)
2.45k
10.21k (x4.16)
TOTAL
153.46k
129.57k (x0.84)

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)
12.61k
14.73k (x1.17)
Test#2 (FP)
17.94k
21.27k (x1.19)
Test#3 (Generic, ZIP)
4.83k
5.52k (x1.14)
Test#1 (Memory)
10.81k
6.32k (x0.58)
TOTAL
46.19k
47.84k (x1.04)

Multithread

i5-10400T

i7-6700K
Test#1 (Integers)
74.62k
61.09k (x0.82)
Test#2 (FP)
119.63k
99.17k (x0.83)
Test#3 (Generic, ZIP)
32.65k
26.57k (x0.81)
Test#1 (Memory)
2.52k
10.26k (x4.07)
TOTAL
229.42k
197.09k (x0.86)

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)
22k
25.78k (x1.17)
Test#2 (FP)
19.98k
23.08k (x1.16)
Test#3 (Generic, ZIP)
4.57k
5.32k (x1.17)
Test#1 (Memory)
11.31k
9.03k (x0.8)
TOTAL
57.85k
63.22k (x1.09)

Multithread

i5-10400T

i7-6700K
Test#1 (Integers)
136.69k
112.83k (x0.83)
Test#2 (FP)
135.25k
106.86k (x0.79)
Test#3 (Generic, ZIP)
32.76k
25.76k (x0.79)
Test#1 (Memory)
2.48k
9.12k (x3.68)
TOTAL
307.18k
254.56k (x0.83)

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. 3.11.4