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Core i7-9700K vs i7-8750H


Description
Both models i7-9700K and i7-8750H 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 i7-9700K gets a score of 460 k points while the i7-8750H gets 231.9 k points.

Summarizing, the i7-9700K is 2 times faster than the i7-8750H. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ec
906ea
Core
Coffee Lake-S
Coffee Lake-H
Architecture
Base frecuency
3.6 GHz
2.2 GHz
Boost frecuency
4.9 GHz
4.1 GHz
Socket
LGA 1151
BGA1440
Cores/Threads
8/8
6/12
TDP
95 W
45 W
Cache L1 (d+i)
8x32+8x32 kB
6x32+6x32 kB
Cache L2
8x256 kB
6x256 kB
Cache L3
12288 kB
9216 kB
Date
October 2018
April 2018
Mean monothread perf.
73.62k points
53.41k points
Mean multithread perf.
460.02k points
231.9k points

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
i7-9700K
i7-8750H
Test#1 (Integers)
29.3k
22.36k (x0.76)
Test#2 (FP)
25.61k
19.33k (x0.75)
Test#3 (Generic, ZIP)
5.86k
4.4k (x0.75)
Test#1 (Memory)
12.86k
7.32k (x0.57)
TOTAL
73.62k
53.41k (x0.73)

Multithread

i7-9700K

i7-8750H
Test#1 (Integers)
217.77k
103.82k (x0.48)
Test#2 (FP)
190.46k
100.47k (x0.53)
Test#3 (Generic, ZIP)
40.48k
23.81k (x0.59)
Test#1 (Memory)
11.31k
3.8k (x0.34)
TOTAL
460.02k
231.9k (x0.5)

Performance/W
i7-9700K
i7-8750H
Test#1 (Integers)
2292 points/W
2307 points/W
Test#2 (FP)
2005 points/W
2233 points/W
Test#3 (Generic, ZIP)
426 points/W
529 points/W
Test#1 (Memory)
119 points/W
84 points/W
TOTAL
4842 points/W
5153 points/W

Performance/GHz
i7-9700K
i7-8750H
Test#1 (Integers)
5981 points/GHz
5454 points/GHz
Test#2 (FP)
5226 points/GHz
4714 points/GHz
Test#3 (Generic, ZIP)
1195 points/GHz
1073 points/GHz
Test#1 (Memory)
2624 points/GHz
1786 points/GHz
TOTAL
15025 points/GHz
13027 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. 3.11.4