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Core i7-8700k vs i9-9900K


Specs
CPUID
906ea
906ec
Core
Coffee Lake-S
Coffee Lake-S
Architecture
Base frecuency
3.7 GHz
3.6 GHz
Boost frecuency
4.7 GHz
5 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/12
8/16
TDP
95 W
95 W
Cache L1 (d+i)
6x32+6x32 kB
8x32+8x32 kB
Cache L2
6x256 kB
8x256 kB
Cache L3
12288 kB
16384 kB
Date
October 2017
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
i7-8700k
i9-9900K
Test#1 (Integers)
4127
5171 (25.30%)
Test#2 (FP)
16959
21152 (24.72%)
Test#3 (Generic, ZIP)
5564
7009 (25.97%)
Test#1 (Memory)
12845
15324 (19.29%)
TOTAL
39495
48655 (23.19%)

Multithread

i7-8700k

i9-9900K
Test#1 (Integers)
24011
38451 (60.14%)
Test#2 (FP)
108690
155679 (43.23%)
Test#3 (Generic, ZIP)
36616
50999 (39.28%)
Test#1 (Memory)
9327
18255 (95.74%)
TOTAL
178644
263385 (47.44%)

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
i7-8700k
i9-9900K
Test#1 (Integers)
31311
33619 (7.37%)
Test#2 (FP)
27982
30015 (7.26%)
Test#3 (Generic, ZIP)
6645
7168 (7.87%)
Test#1 (Memory)
15193
15434 (1.59%)
TOTAL
81130
86236 (6.29%)

Multithread

i7-8700k

i9-9900K
Test#1 (Integers)
202490
248933 (22.94%)
Test#2 (FP)
186057
224434 (20.63%)
Test#3 (Generic, ZIP)
44919
53389 (18.86%)
Test#1 (Memory)
10335
18540 (79.40%)
TOTAL
443800
545296 (22.87%)

Performance/W
i7-8700k
i9-9900K
Test#1 (Integers)
2131 points/W
2620 points/W
Test#2 (FP)
1958 points/W
2362 points/W
Test#3 (Generic, ZIP)
473 points/W
562 points/W
Test#1 (Memory)
109 points/W
195 points/W
TOTAL
4672 points/W
5740 points/W

Performance/GHz
i7-8700k
i9-9900K
Test#1 (Integers)
6662 points/GHz
6724 points/GHz
Test#2 (FP)
5954 points/GHz
6003 points/GHz
Test#3 (Generic, ZIP)
1414 points/GHz
1434 points/GHz
Test#1 (Memory)
3232 points/GHz
3087 points/GHz
TOTAL
17262 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. 3.7.3