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Core i7-10870H vs i7-6700K


Description
The i7-10870H is based on Comet Lake architecture while the i7-6700K is based on Skylake.

Using the multithread performance as a reference, the i7-10870H gets a score of 487 k points while the i7-6700K gets 254.6 k points.

Summarizing, the i7-10870H is 1.9 times faster than the i7-6700K . 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
4 GHz
Boost frecuency
5 GHz
4.2 GHz
Socket
FC-BGA 1440
LGA 1151
Cores/Threads
8/16
4/8
TDP
45 W
95 W
Cache L1 (d+i)
8x32+8x32 kB
32+32 kB
Cache L2
8x256 kB
256 kB
Cache L3
16384 kB
8192 kB
Date
September 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
i7-10870H
i7-6700K
Test#1 (Integers)
4766
4072 (-14.55%)
Test#2 (FP)
19806
16620 (-16.09%)
Test#3 (Generic, ZIP)
6292
5225 (-16.96%)
Test#1 (Memory)
14034
6279 (-55.26%)
TOTAL
44898
32196 (-28.29%)

Multithread

i7-10870H

i7-6700K
Test#1 (Integers)
31208
16366 (-47.56%)
Test#2 (FP)
151010
77341 (-48.78%)
Test#3 (Generic, ZIP)
50126
25654 (-48.82%)
Test#1 (Memory)
8366
10206 (22.00%)
TOTAL
240709
129568 (-46.17%)

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
i7-6700K
Test#1 (Integers)
17174
14733 (-14.21%)
Test#2 (FP)
25260
21273 (-15.79%)
Test#3 (Generic, ZIP)
6704
5516 (-17.72%)
Test#1 (Memory)
13813
6320 (-54.25%)
TOTAL
62952
47841 (-24.00%)

Multithread

i7-10870H

i7-6700K
Test#1 (Integers)
116682
61093 (-47.64%)
Test#2 (FP)
187278
99165 (-47.05%)
Test#3 (Generic, ZIP)
51518
26574 (-48.42%)
Test#1 (Memory)
8390
10257 (22.25%)
TOTAL
363869
197089 (-45.84%)

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
i7-6700K
Test#1 (Integers)
30376
25782 (-15.12%)
Test#2 (FP)
27947
23081 (-17.41%)
Test#3 (Generic, ZIP)
6510
5325 (-18.21%)
Test#1 (Memory)
14366
9031 (-37.14%)
TOTAL
79200
63219 (-20.18%)

Multithread

i7-10870H

i7-6700K
Test#1 (Integers)
216184
112827 (-47.81%)
Test#2 (FP)
210824
106861 (-49.31%)
Test#3 (Generic, ZIP)
51574
25758 (-50.06%)
Test#1 (Memory)
8465
9116 (7.68%)
TOTAL
487048
254562 (-47.73%)

Performance/W
i7-10870H
i7-6700K
Test#1 (Integers)
4804 points/W
1188 points/W
Test#2 (FP)
4685 points/W
1125 points/W
Test#3 (Generic, ZIP)
1146 points/W
271 points/W
Test#1 (Memory)
188 points/W
96 points/W
TOTAL
10823 points/W
2680 points/W

Performance/GHz
i7-10870H
i7-6700K
Test#1 (Integers)
6075 points/GHz
6139 points/GHz
Test#2 (FP)
5589 points/GHz
5495 points/GHz
Test#3 (Generic, ZIP)
1302 points/GHz
1268 points/GHz
Test#1 (Memory)
2873 points/GHz
2150 points/GHz
TOTAL
15840 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