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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 292.3 k points while the i9-9900K gets 529.3 k points.

Summarizing, the i9-9900K is 1.8 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-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
4996 (7.92%)
Test#2 (FP)
18925
20217 (6.83%)
Test#3 (Generic, ZIP)
6221
6545 (5.20%)
Test#1 (Memory)
13922
13775 (-1.06%)
TOTAL
43698
45532 (4.20%)

Multithread

i7-7700K

i9-9900K
Test#1 (Integers)
18529
36390 (96.39%)
Test#2 (FP)
86487
166549 (92.57%)
Test#3 (Generic, ZIP)
28778
54922 (90.85%)
Test#1 (Memory)
9674
8963 (-7.35%)
TOTAL
143468
266824 (85.98%)

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
i9-9900K
Test#1 (Integers)
17549
17979 (2.45%)
Test#2 (FP)
27822
27039 (-2.82%)
Test#3 (Generic, ZIP)
6796
6627 (-2.49%)
Test#1 (Memory)
14832
13600 (-8.31%)
TOTAL
66999
65245 (-2.62%)

Multithread

i7-7700K

i9-9900K
Test#1 (Integers)
68395
130881 (91.36%)
Test#2 (FP)
118805
208498 (75.50%)
Test#3 (Generic, ZIP)
33336
54122 (62.35%)
Test#1 (Memory)
17434
8905 (-48.92%)
TOTAL
237970
402406 (69.10%)

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)
30879
32085 (3.91%)
Test#2 (FP)
27266
28170 (3.32%)
Test#3 (Generic, ZIP)
6416
6675 (4.04%)
Test#1 (Memory)
14011
14978 (6.89%)
TOTAL
78572
81908 (4.25%)

Multithread

i7-7700K

i9-9900K
Test#1 (Integers)
130361
242980 (86.39%)
Test#2 (FP)
122434
220157 (79.82%)
Test#3 (Generic, ZIP)
29679
53966 (81.83%)
Test#1 (Memory)
9830
12218 (24.29%)
TOTAL
292304
529320 (81.09%)

Performance/W
i7-7700K
i9-9900K
Test#1 (Integers)
1372 points/W
2558 points/W
Test#2 (FP)
1289 points/W
2317 points/W
Test#3 (Generic, ZIP)
312 points/W
568 points/W
Test#1 (Memory)
103 points/W
129 points/W
TOTAL
3077 points/W
5572 points/W

Performance/GHz
i7-7700K
i9-9900K
Test#1 (Integers)
6862 points/GHz
6417 points/GHz
Test#2 (FP)
6059 points/GHz
5634 points/GHz
Test#3 (Generic, ZIP)
1426 points/GHz
1335 points/GHz
Test#1 (Memory)
3114 points/GHz
2996 points/GHz
TOTAL
17460 points/GHz
16382 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