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Core i7-7700K vs i7-9750H


Description
The i7-7700K is based on Kaby Lake architecture while the i7-9750H is based on Coffee Lake.

Using the multithread performance as a reference, the i7-7700K gets a score of 292.3 k points while the i7-9750H gets 336.1 k points.

Summarizing, the i7-9750H is 1.1 times faster than the i7-7700K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906e9
906ed
Core
Kaby Lake-S
Coffee Lake-H
Architecture
Base frecuency
4.2 GHz
2.6 GHz
Boost frecuency
4.5 GHz
4.5 GHz
Socket
LGA 1151
BGA 1440
Cores/Threads
4/8
6/12
TDP
95 W
45 W
Cache L1 (d+i)
32+32 kB
6x32+6x32 kB
Cache L2
256 kB
6x256 kB
Cache L3
8192 kB
12288 kB
Date
September 2016
April 2019

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
i7-7700K
i7-9750H
Test#1 (Integers)
4629
4527 (-2.20%)
Test#2 (FP)
18925
18236 (-3.64%)
Test#3 (Generic, ZIP)
6221
5763 (-7.36%)
Test#1 (Memory)
13922
13010 (-6.55%)
TOTAL
43698
41536 (-4.95%)

Multithread

i7-7700K

i7-9750H
Test#1 (Integers)
18529
24297 (31.13%)
Test#2 (FP)
86487
97876 (13.17%)
Test#3 (Generic, ZIP)
28778
29846 (3.71%)
Test#1 (Memory)
9674
11933 (23.35%)
TOTAL
143468
163951 (14.28%)

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
i7-7700K
i7-9750H
Test#1 (Integers)
17549
16307 (-7.08%)
Test#2 (FP)
27822
24475 (-12.03%)
Test#3 (Generic, ZIP)
6796
5867 (-13.67%)
Test#1 (Memory)
14832
13024 (-12.19%)
TOTAL
66999
59673 (-10.93%)

Multithread

i7-7700K

i7-9750H
Test#1 (Integers)
68395
87541 (27.99%)
Test#2 (FP)
118805
131053 (10.31%)
Test#3 (Generic, ZIP)
33336
28473 (-14.59%)
Test#1 (Memory)
17434
11801 (-32.31%)
TOTAL
237970
258867 (8.78%)

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
i7-7700K
i7-9750H
Test#1 (Integers)
30879
29414 (-4.74%)
Test#2 (FP)
27266
25808 (-5.35%)
Test#3 (Generic, ZIP)
6416
5970 (-6.95%)
Test#1 (Memory)
14011
13823 (-1.34%)
TOTAL
78572
75016 (-4.53%)

Multithread

i7-7700K

i7-9750H
Test#1 (Integers)
130361
157934 (21.15%)
Test#2 (FP)
122434
137414 (12.24%)
Test#3 (Generic, ZIP)
29679
28760 (-3.10%)
Test#1 (Memory)
9830
11984 (21.91%)
TOTAL
292304
336092 (14.98%)

Performance/W
i7-7700K
i7-9750H
Test#1 (Integers)
1372 points/W
3510 points/W
Test#2 (FP)
1289 points/W
3054 points/W
Test#3 (Generic, ZIP)
312 points/W
639 points/W
Test#1 (Memory)
103 points/W
266 points/W
TOTAL
3077 points/W
7469 points/W

Performance/GHz
i7-7700K
i7-9750H
Test#1 (Integers)
6862 points/GHz
6536 points/GHz
Test#2 (FP)
6059 points/GHz
5735 points/GHz
Test#3 (Generic, ZIP)
1426 points/GHz
1327 points/GHz
Test#1 (Memory)
3114 points/GHz
3072 points/GHz
TOTAL
17460 points/GHz
16670 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