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Core i9-9900KF vs i7-6700K


Description
The i9-9900KF is based on Coffee Lake architecture while the i7-6700K is based on Skylake.

Using the multithread performance as a reference, the i9-9900KF gets a score of 592.9 k points while the i7-6700K gets 254.6 k points.

Summarizing, the i9-9900KF is 2.3 times faster than the i7-6700K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ed
506e3
Core
Coffee Lake-S
Skylake-S
Architecture
Base frecuency
3.6 GHz
4 GHz
Boost frecuency
5 GHz
4.2 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
8/16
4/8
TDP
95 W
95 W
Cache L1 (d+i)
8x32+8x32 kB
4x32+4x32 kB
Cache L2
8x256 kB
256 kB
Cache L3
16386 kB
8192 kB
Date
January 2019
May 2015
Mean monothread perf.
84.54k points
63.22k points
Mean multithread perf.
592.86k points
254.56k points

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
i9-9900KF
i7-6700K
Test#1 (Integers)
33.03k
25.78k (x0.78)
Test#2 (FP)
29.52k
23.08k (x0.78)
Test#3 (Generic, ZIP)
6.55k
5.32k (x0.81)
Test#1 (Memory)
15.45k
9.03k (x0.58)
TOTAL
84.54k
63.22k (x0.75)

Multithread

i9-9900KF

i7-6700K
Test#1 (Integers)
276.22k
112.83k (x0.41)
Test#2 (FP)
250.61k
106.86k (x0.43)
Test#3 (Generic, ZIP)
57.2k
25.76k (x0.45)
Test#1 (Memory)
8.84k
9.12k (x1.03)
TOTAL
592.86k
254.56k (x0.43)

Performance/W
i9-9900KF
i7-6700K
Test#1 (Integers)
2908 points/W
1188 points/W
Test#2 (FP)
2638 points/W
1125 points/W
Test#3 (Generic, ZIP)
602 points/W
271 points/W
Test#1 (Memory)
93 points/W
96 points/W
TOTAL
6241 points/W
2680 points/W

Performance/GHz
i9-9900KF
i7-6700K
Test#1 (Integers)
6605 points/GHz
6139 points/GHz
Test#2 (FP)
5904 points/GHz
5495 points/GHz
Test#3 (Generic, ZIP)
1309 points/GHz
1268 points/GHz
Test#1 (Memory)
3090 points/GHz
2150 points/GHz
TOTAL
16909 points/GHz
15052 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. 3.11.4