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Core i7-8700k vs i7-9850H


Description
Both models i7-8700k and i7-9850H are based on Coffee Lake architecture.

Coffee Lake is the second refinement of Intel’s 14nm (Tri-Gate) technology. While it uses LGA1151 socket, it is incompatible with previous generations due to electrical changes in socket’s pins so these CPUs require Z370 chipset. This kind of generation introduced more cores in every range to compete with new AMD’s architecture. Coffee Lake uses DDR4 memory at 2400MHz for i3 and at 2666MHz for i5, i7 CPUs plus iGPU frequency has been increased 50MHz with respect to previous generation.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the i7-9850H gets 289.3 k points.

Summarizing, the i7-8700k is 1.5 times faster than the i7-9850H. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
906ed
Core
Coffee Lake-S
Coffee Lake-H
Architecture
Base frecuency
3.7 GHz
2.6 GHz
Boost frecuency
4.7 GHz
4.6 GHz
Socket
LGA 1151
BGA 1440
Cores/Threads
6/12
6/12
TDP
95 W
45 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
12288 kB
12288 kB
Date
October 2017
Jun 2019

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
i7-8700k
i7-9850H
Test#1 (Integers)
31204
19829 (-36.46%)
Test#2 (FP)
27821
16519 (-40.62%)
Test#3 (Generic, ZIP)
6568
3867 (-41.13%)
Test#1 (Memory)
15004
9021 (-39.87%)
TOTAL
80598
49236 (-38.91%)

Multithread

i7-8700k

i7-9850H
Test#1 (Integers)
202422
130192 (-35.68%)
Test#2 (FP)
186332
121438 (-34.83%)
Test#3 (Generic, ZIP)
44958
28052 (-37.60%)
Test#1 (Memory)
10054
9620 (-4.31%)
TOTAL
443765
289302 (-34.81%)

Performance/W
i7-8700k
i7-9850H
Test#1 (Integers)
2131 points/W
2893 points/W
Test#2 (FP)
1961 points/W
2699 points/W
Test#3 (Generic, ZIP)
473 points/W
623 points/W
Test#1 (Memory)
106 points/W
214 points/W
TOTAL
4671 points/W
6429 points/W

Performance/GHz
i7-8700k
i7-9850H
Test#1 (Integers)
6639 points/GHz
4311 points/GHz
Test#2 (FP)
5919 points/GHz
3591 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
841 points/GHz
Test#1 (Memory)
3192 points/GHz
1961 points/GHz
TOTAL
17148 points/GHz
10703 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