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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

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)
4004
4127 (3.07%)
Test#2 (FP)
14189
16959 (19.52%)
Test#3 (Generic, ZIP)
4620
5564 (20.44%)
Test#1 (Memory)
11029
12845 (16.47%)
TOTAL
33842
39495 (16.70%)

Multithread

i5-10400T

i7-8700k
Test#1 (Integers)
22767
24011 (5.46%)
Test#2 (FP)
96586
108690 (12.53%)
Test#3 (Generic, ZIP)
31652
36616 (15.68%)
Test#1 (Memory)
2451
9327 (280.52%)
TOTAL
153456
178644 (16.41%)

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)
12610
12920 (2.46%)
Test#2 (FP)
17941
20678 (15.25%)
Test#3 (Generic, ZIP)
4828
5295 (9.67%)
Test#1 (Memory)
10811
12587 (16.42%)
TOTAL
46191
51480 (11.45%)

Multithread

i5-10400T

i7-8700k
Test#1 (Integers)
74617
94259 (26.32%)
Test#2 (FP)
119634
152549 (27.51%)
Test#3 (Generic, ZIP)
32645
39735 (21.72%)
Test#1 (Memory)
2520
8527 (238.41%)
TOTAL
229416
295071 (28.62%)

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)
12498
16874 (35.02%)
Test#2 (FP)
19053
26119 (37.09%)
Test#3 (Generic, ZIP)
4722
6329 (34.03%)
Test#1 (Memory)
10297
13708 (33.12%)
TOTAL
46570
63030 (35.35%)

Multithread

i5-10400T

i7-8700k
Test#1 (Integers)
74581
105740 (41.78%)
Test#2 (FP)
126959
180520 (42.19%)
Test#3 (Generic, ZIP)
31762
44994 (41.66%)
Test#1 (Memory)
2497
8512 (240.86%)
TOTAL
235799
339766 (44.09%)

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
i7-8700k
Test#1 (Integers)
21999
31204 (41.85%)
Test#2 (FP)
19977
27821 (39.27%)
Test#3 (Generic, ZIP)
4566
6568 (43.84%)
Test#1 (Memory)
11306
15004 (32.71%)
TOTAL
57847
80598 (39.33%)

Multithread

i5-10400T

i7-8700k
Test#1 (Integers)
136687
202422 (48.09%)
Test#2 (FP)
135254
186332 (37.76%)
Test#3 (Generic, ZIP)
32756
44958 (37.25%)
Test#1 (Memory)
2478
10054 (305.70%)
TOTAL
307175
443765 (44.47%)

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. 3.7.9