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Core i7-10870H vs i7-8700k


Description
The i7-10870H is based on Comet Lake architecture while the i7-8700k is based on Coffee Lake.

Using the multithread performance as a reference, the i7-10870H gets a score of 487 k points while the i7-8700k gets 440.8 k points.

Summarizing, the i7-10870H is 1.1 times faster than the i7-8700k. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
a0652
906ea
Core
Comet Lake-H
Coffee Lake-S
Architecture
Base frecuency
2.2 GHz
3.7 GHz
Boost frecuency
5 GHz
4.7 GHz
Socket
FC-BGA 1440
LGA 1151
Cores/Threads
8/16
6/12
TDP
45 W
95 W
Cache L1 (d+i)
8x32+8x32 kB
6x32+6x32 kB
Cache L2
8x256 kB
6x256 kB
Cache L3
16384 kB
12288 kB
Date
September 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
i7-10870H
i7-8700k
Test#1 (Integers)
4766
4127 (-13.40%)
Test#2 (FP)
19806
16959 (-14.38%)
Test#3 (Generic, ZIP)
6292
5564 (-11.58%)
Test#1 (Memory)
14034
12845 (-8.47%)
TOTAL
44898
39495 (-12.03%)

Multithread

i7-10870H

i7-8700k
Test#1 (Integers)
31208
24011 (-23.06%)
Test#2 (FP)
151010
108690 (-28.02%)
Test#3 (Generic, ZIP)
50126
36616 (-26.95%)
Test#1 (Memory)
8366
9327 (11.49%)
TOTAL
240709
178644 (-25.78%)

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
i7-8700k
Test#1 (Integers)
16136
16874 (4.57%)
Test#2 (FP)
24736
26119 (5.59%)
Test#3 (Generic, ZIP)
5984
6329 (5.77%)
Test#1 (Memory)
12696
13708 (7.98%)
TOTAL
59551
63030 (5.84%)

Multithread

i7-10870H

i7-8700k
Test#1 (Integers)
117028
105740 (-9.65%)
Test#2 (FP)
199876
180520 (-9.68%)
Test#3 (Generic, ZIP)
50641
44994 (-11.15%)
Test#1 (Memory)
8229
8512 (3.44%)
TOTAL
375774
339766 (-9.58%)

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
i7-8700k
Test#1 (Integers)
30376
31057 (2.24%)
Test#2 (FP)
27947
27738 (-0.75%)
Test#3 (Generic, ZIP)
6510
6573 (0.97%)
Test#1 (Memory)
14366
14996 (4.38%)
TOTAL
79200
80364 (1.47%)

Multithread

i7-10870H

i7-8700k
Test#1 (Integers)
216184
201030 (-7.01%)
Test#2 (FP)
210824
184775 (-12.36%)
Test#3 (Generic, ZIP)
51574
44705 (-13.32%)
Test#1 (Memory)
8465
10281 (21.45%)
TOTAL
487048
440791 (-9.50%)

Performance/W
i7-10870H
i7-8700k
Test#1 (Integers)
4804 points/W
2116 points/W
Test#2 (FP)
4685 points/W
1945 points/W
Test#3 (Generic, ZIP)
1146 points/W
471 points/W
Test#1 (Memory)
188 points/W
108 points/W
TOTAL
10823 points/W
4640 points/W

Performance/GHz
i7-10870H
i7-8700k
Test#1 (Integers)
6075 points/GHz
6608 points/GHz
Test#2 (FP)
5589 points/GHz
5902 points/GHz
Test#3 (Generic, ZIP)
1302 points/GHz
1399 points/GHz
Test#1 (Memory)
2873 points/GHz
3191 points/GHz
TOTAL
15840 points/GHz
17099 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