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Core i7-7700K vs i9-9900K


Description
The i7-7700K is based on Kaby Lake architecture while the i9-9900K is based on Coffee Lake.

Using the multithread performance as a reference, the i7-7700K gets a score of 291.1 k points while the i9-9900K gets 545.3 k points.

Summarizing, the i9-9900K is 1.9 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
906ec
Core
Kaby Lake-S
Coffee Lake-S
Architecture
Base frecuency
4.2 GHz
3.6 GHz
Boost frecuency
4.5 GHz
5 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
4/8
8/16
TDP
95 W
95 W
Cache L1 (d+i)
32+32 kB
8x32+8x32 kB
Cache L2
256 kB
8x256 kB
Cache L3
8192 kB
16384 kB
Date
September 2016
October 2018

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
i9-9900K
Test#1 (Integers)
4629
5171 (11.70%)
Test#2 (FP)
18925
21152 (11.77%)
Test#3 (Generic, ZIP)
6221
7009 (12.66%)
Test#1 (Memory)
13922
15324 (10.07%)
TOTAL
43698
48655 (11.35%)

Multithread

i7-7700K

i9-9900K
Test#1 (Integers)
18529
38451 (107.51%)
Test#2 (FP)
86487
155679 (80.00%)
Test#3 (Generic, ZIP)
28778
50999 (77.22%)
Test#1 (Memory)
9674
18255 (88.70%)
TOTAL
143468
263385 (83.58%)

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
i7-7700K
i9-9900K
Test#1 (Integers)
30864
33619 (8.93%)
Test#2 (FP)
27262
30015 (10.10%)
Test#3 (Generic, ZIP)
6421
7168 (11.64%)
Test#1 (Memory)
13994
15434 (10.29%)
TOTAL
78541
86236 (9.80%)

Multithread

i7-7700K

i9-9900K
Test#1 (Integers)
129531
248933 (92.18%)
Test#2 (FP)
122200
224434 (83.66%)
Test#3 (Generic, ZIP)
29617
53389 (80.27%)
Test#1 (Memory)
9751
18540 (90.13%)
TOTAL
291099
545296 (87.32%)

Performance/W
i7-7700K
i9-9900K
Test#1 (Integers)
1363 points/W
2620 points/W
Test#2 (FP)
1286 points/W
2362 points/W
Test#3 (Generic, ZIP)
312 points/W
562 points/W
Test#1 (Memory)
103 points/W
195 points/W
TOTAL
3064 points/W
5740 points/W

Performance/GHz
i7-7700K
i9-9900K
Test#1 (Integers)
6859 points/GHz
6724 points/GHz
Test#2 (FP)
6058 points/GHz
6003 points/GHz
Test#3 (Generic, ZIP)
1427 points/GHz
1434 points/GHz
Test#1 (Memory)
3110 points/GHz
3087 points/GHz
TOTAL
17453 points/GHz
17247 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