| | | |

Core i7-10870H vs i5-6400


Description
The i7-10870H is based on Comet Lake architecture while the i5-6400 is based on Skylake.

Using the multithread performance as a reference, the i7-10870H gets a score of 487 k points while the i5-6400 gets 176.7 k points.

Summarizing, the i7-10870H is 2.8 times faster than the i5-6400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
a0652
506e3
Core
Comet Lake-H
Skylake-S
Architecture
Base frecuency
2.2 GHz
2.7 GHz
Boost frecuency
5 GHz
3.3 GHz
Socket
FC-BGA 1440
LGA 1151
Cores/Threads
8/16
4/4
TDP
45 W
65 W
Cache L1 (d+i)
8x32+8x32 kB
4x32+4x32 kB
Cache L2
8x256 kB
4x256 kB
Cache L3
16384 kB
6144 kB
Date
September 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
i7-10870H
i5-6400
Test#1 (Integers)
4766
3185 (-33.17%)
Test#2 (FP)
19806
12581 (-36.48%)
Test#3 (Generic, ZIP)
6292
4105 (-34.76%)
Test#1 (Memory)
14034
3934 (-71.97%)
TOTAL
44898
23805 (-46.98%)

Multithread

i7-10870H

i5-6400
Test#1 (Integers)
31208
10777 (-65.47%)
Test#2 (FP)
151010
44113 (-70.79%)
Test#3 (Generic, ZIP)
50126
13887 (-72.30%)
Test#1 (Memory)
8366
7829 (-6.41%)
TOTAL
240709
76606 (-68.17%)

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
i7-10870H
i5-6400
Test#1 (Integers)
17174
11411 (-33.56%)
Test#2 (FP)
25260
16352 (-35.27%)
Test#3 (Generic, ZIP)
6704
4146 (-38.15%)
Test#1 (Memory)
13813
3277 (-76.28%)
TOTAL
62952
35186 (-44.11%)

Multithread

i7-10870H

i5-6400
Test#1 (Integers)
116682
41474 (-64.46%)
Test#2 (FP)
187278
65462 (-65.05%)
Test#3 (Generic, ZIP)
51518
16202 (-68.55%)
Test#1 (Memory)
8390
7660 (-8.70%)
TOTAL
363869
130798 (-64.05%)

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
i7-10870H
i5-6400
Test#1 (Integers)
16136
11824 (-26.72%)
Test#2 (FP)
24736
18358 (-25.78%)
Test#3 (Generic, ZIP)
5984
4426 (-26.04%)
Test#1 (Memory)
12696
4950 (-61.01%)
TOTAL
59551
39558 (-33.57%)

Multithread

i7-10870H

i5-6400
Test#1 (Integers)
117028
46044 (-60.66%)
Test#2 (FP)
199876
69468 (-65.24%)
Test#3 (Generic, ZIP)
50641
16330 (-67.75%)
Test#1 (Memory)
8229
7742 (-5.92%)
TOTAL
375774
139584 (-62.85%)

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
i7-10870H
i5-6400
Test#1 (Integers)
30376
21213 (-30.17%)
Test#2 (FP)
27947
18149 (-35.06%)
Test#3 (Generic, ZIP)
6510
4213 (-35.28%)
Test#1 (Memory)
14366
4304 (-70.04%)
TOTAL
79200
47879 (-39.55%)

Multithread

i7-10870H

i5-6400
Test#1 (Integers)
216184
80359 (-62.83%)
Test#2 (FP)
210824
71943 (-65.88%)
Test#3 (Generic, ZIP)
51574
16375 (-68.25%)
Test#1 (Memory)
8465
8054 (-4.86%)
TOTAL
487048
176731 (-63.71%)

Performance/W
i7-10870H
i5-6400
Test#1 (Integers)
4804 points/W
1236 points/W
Test#2 (FP)
4685 points/W
1107 points/W
Test#3 (Generic, ZIP)
1146 points/W
252 points/W
Test#1 (Memory)
188 points/W
124 points/W
TOTAL
10823 points/W
2719 points/W

Performance/GHz
i7-10870H
i5-6400
Test#1 (Integers)
6075 points/GHz
6428 points/GHz
Test#2 (FP)
5589 points/GHz
5500 points/GHz
Test#3 (Generic, ZIP)
1302 points/GHz
1277 points/GHz
Test#1 (Memory)
2873 points/GHz
1304 points/GHz
TOTAL
15840 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