Core i7-9750H vs i7-8700k
Description
Both models i7-9750H and i7-8700k 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 i7-9750H gets a score of 276.5 k points while the i7-8700k gets 443.8 k points.
Summarizing, the i7-8700k is 1.6 times faster than the i7-9750H. To get a proper comparison between both models, take a look to the data shown below.
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 i7-9750H gets a score of 276.5 k points while the i7-8700k gets 443.8 k points.
Summarizing, the i7-8700k is 1.6 times faster than the i7-9750H. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
906ed
906ea
Core
Coffee Lake-H
Coffee Lake-S
Base frecuency
2.6 GHz
3.7 GHz
Boost frecuency
4.5 GHz
4.7 GHz
Socket
BGA 1440
LGA 1151
Cores/Threads
6/12
6/12
TDP
45 W
95 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
12288 kB
12288 kB
Date
April 2019
October 2017
Mean monothread perf.
62.92k points
80.6k points
Mean multithread perf.
276.46k points
443.77k points
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
i7-9750H
i7-8700k
Test#1 (Integers)
4.53k
4.13k (x0.91)
Test#2 (FP)
18.24k
16.96k (x0.93)
Test#3 (Generic, ZIP)
5.76k
5.56k (x0.97)
Test#1 (Memory)
13.01k
12.85k (x0.99)
TOTAL
41.54k
39.5k (x0.95)
Multithread
i7-9750H
i7-8700k
Test#1 (Integers)
24.3k
24.01k (x0.99)
Test#2 (FP)
97.88k
108.69k (x1.11)
Test#3 (Generic, ZIP)
29.85k
36.62k (x1.23)
Test#1 (Memory)
11.93k
9.33k (x0.78)
TOTAL
163.95k
178.64k (x1.09)
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
i7-9750H
i7-8700k
Test#1 (Integers)
16.32k
12.92k (x0.79)
Test#2 (FP)
23.42k
20.68k (x0.88)
Test#3 (Generic, ZIP)
6.04k
5.3k (x0.88)
Test#1 (Memory)
13.24k
12.59k (x0.95)
TOTAL
59.03k
51.48k (x0.87)
Multithread
i7-9750H
i7-8700k
Test#1 (Integers)
86.92k
94.26k (x1.08)
Test#2 (FP)
126.14k
152.55k (x1.21)
Test#3 (Generic, ZIP)
29.62k
39.74k (x1.34)
Test#1 (Memory)
11.86k
8.53k (x0.72)
TOTAL
254.54k
295.07k (x1.16)
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
i7-9750H
i7-8700k
Test#1 (Integers)
16.31k
16.87k (x1.03)
Test#2 (FP)
24.48k
26.12k (x1.07)
Test#3 (Generic, ZIP)
5.87k
6.33k (x1.08)
Test#1 (Memory)
13.02k
13.71k (x1.05)
TOTAL
59.67k
63.03k (x1.06)
Multithread
i7-9750H
i7-8700k
Test#1 (Integers)
87.54k
105.74k (x1.21)
Test#2 (FP)
131.05k
180.52k (x1.38)
Test#3 (Generic, ZIP)
28.47k
44.99k (x1.58)
Test#1 (Memory)
11.8k
8.51k (x0.72)
TOTAL
258.87k
339.77k (x1.31)
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
i7-9750H
i7-8700k
Test#1 (Integers)
25.22k
31.2k (x1.24)
Test#2 (FP)
21.97k
27.82k (x1.27)
Test#3 (Generic, ZIP)
5.02k
6.57k (x1.31)
Test#1 (Memory)
10.71k
15k (x1.4)
TOTAL
62.92k
80.6k (x1.28)
Multithread
i7-9750H
i7-8700k
Test#1 (Integers)
125.56k
202.42k (x1.61)
Test#2 (FP)
115.86k
186.33k (x1.61)
Test#3 (Generic, ZIP)
25.63k
44.96k (x1.75)
Test#1 (Memory)
9.4k
10.05k (x1.07)
TOTAL
276.46k
443.77k (x1.61)
Performance/W
i7-9750H
i7-8700k
Test#1 (Integers)
2790 points/W
2131 points/W
Test#2 (FP)
2575 points/W
1961 points/W
Test#3 (Generic, ZIP)
570 points/W
473 points/W
Test#1 (Memory)
209 points/W
106 points/W
TOTAL
6144 points/W
4671 points/W
Performance/GHz
i7-9750H
i7-8700k
Test#1 (Integers)
5605 points/GHz
6639 points/GHz
Test#2 (FP)
4882 points/GHz
5919 points/GHz
Test#3 (Generic, ZIP)
1115 points/GHz
1397 points/GHz
Test#1 (Memory)
2380 points/GHz
3192 points/GHz
TOTAL
13982 points/GHz
17148 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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4