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Core i5-10400T vs i7-8700k


Description
The i5-10400T is based on Comet Lake architecture while the i7-8700k is based on Coffee Lake.

Using the multithread performance as a reference, the i5-10400T gets a score of 307.2 k points while the i7-8700k gets 443.8 k points.

Summarizing, the i7-8700k is 1.4 times faster than the i5-10400T. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
a0653
906ea
Core
Comet Lake-S
Coffee Lake-S
Architecture
Base frecuency
2 GHz
3.7 GHz
Boost frecuency
3.6 GHz
4.7 GHz
Socket
FC-LGA 1200
LGA 1151
Cores/Threads
6/12
6/12
TDP
35 W
95 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
12288 kB
12288 kB
Date
April 2020
October 2017
Mean monothread perf.
57.85k points
80.6k points
Mean multithread perf.
307.18k points
443.77k 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
i7-8700k
Test#1 (Integers)
4k
4.13k (x1.03)
Test#2 (FP)
14.19k
16.96k (x1.2)
Test#3 (Generic, ZIP)
4.62k
5.56k (x1.2)
Test#1 (Memory)
11.03k
12.85k (x1.16)
TOTAL
33.84k
39.5k (x1.17)

Multithread

i5-10400T

i7-8700k
Test#1 (Integers)
22.77k
24.01k (x1.05)
Test#2 (FP)
96.59k
108.69k (x1.13)
Test#3 (Generic, ZIP)
31.65k
36.62k (x1.16)
Test#1 (Memory)
2.45k
9.33k (x3.81)
TOTAL
153.46k
178.64k (x1.16)

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
i7-8700k
Test#1 (Integers)
12.61k
12.92k (x1.02)
Test#2 (FP)
17.94k
20.68k (x1.15)
Test#3 (Generic, ZIP)
4.83k
5.3k (x1.1)
Test#1 (Memory)
10.81k
12.59k (x1.16)
TOTAL
46.19k
51.48k (x1.11)

Multithread

i5-10400T

i7-8700k
Test#1 (Integers)
74.62k
94.26k (x1.26)
Test#2 (FP)
119.63k
152.55k (x1.28)
Test#3 (Generic, ZIP)
32.65k
39.74k (x1.22)
Test#1 (Memory)
2.52k
8.53k (x3.38)
TOTAL
229.42k
295.07k (x1.29)

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
i7-8700k
Test#1 (Integers)
12.5k
16.87k (x1.35)
Test#2 (FP)
19.05k
26.12k (x1.37)
Test#3 (Generic, ZIP)
4.72k
6.33k (x1.34)
Test#1 (Memory)
10.3k
13.71k (x1.33)
TOTAL
46.57k
63.03k (x1.35)

Multithread

i5-10400T

i7-8700k
Test#1 (Integers)
74.58k
105.74k (x1.42)
Test#2 (FP)
126.96k
180.52k (x1.42)
Test#3 (Generic, ZIP)
31.76k
44.99k (x1.42)
Test#1 (Memory)
2.5k
8.51k (x3.41)
TOTAL
235.8k
339.77k (x1.44)

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
i7-8700k
Test#1 (Integers)
22k
31.2k (x1.42)
Test#2 (FP)
19.98k
27.82k (x1.39)
Test#3 (Generic, ZIP)
4.57k
6.57k (x1.44)
Test#1 (Memory)
11.31k
15k (x1.33)
TOTAL
57.85k
80.6k (x1.39)

Multithread

i5-10400T

i7-8700k
Test#1 (Integers)
136.69k
202.42k (x1.48)
Test#2 (FP)
135.25k
186.33k (x1.38)
Test#3 (Generic, ZIP)
32.76k
44.96k (x1.37)
Test#1 (Memory)
2.48k
10.05k (x4.06)
TOTAL
307.18k
443.77k (x1.44)

Performance/W
i5-10400T
i7-8700k
Test#1 (Integers)
3905 points/W
2131 points/W
Test#2 (FP)
3864 points/W
1961 points/W
Test#3 (Generic, ZIP)
936 points/W
473 points/W
Test#1 (Memory)
71 points/W
106 points/W
TOTAL
8776 points/W
4671 points/W

Performance/GHz
i5-10400T
i7-8700k
Test#1 (Integers)
6111 points/GHz
6639 points/GHz
Test#2 (FP)
5549 points/GHz
5919 points/GHz
Test#3 (Generic, ZIP)
1268 points/GHz
1397 points/GHz
Test#1 (Memory)
3141 points/GHz
3192 points/GHz
TOTAL
16069 points/GHz
17148 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