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Core i9-9900KF vs Ryzen 9 3900X


Description
The i9-9900KF is based on Coffee Lake architecture while the 3900X is based on Zen 2.

Using the multithread performance as a reference, the i9-9900KF gets a score of 592.9 k points while the 3900X gets 756.3 k points.

Summarizing, the 3900X is 1.3 times faster than the i9-9900KF. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ed
870f10
Core
Coffee Lake-S
Matisse
Architecture
Base frecuency
3.6 GHz
3.8 GHz
Boost frecuency
5 GHz
4.6 GHz
Socket
LGA 1151
AM4
Cores/Threads
8/16
12/24
TDP
95 W
105 W
Cache L1 (d+i)
8x32+8x32 kB
12x32+12x32 kB
Cache L2
8x256 kB
12x512 kB
Cache L3
16386 kB
4x16384 kB
Date
January 2019
July 2019
Mean monothread perf.
84.54k points
72.51k points
Mean multithread perf.
592.86k points
756.3k 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
3900X
Test#1 (Integers)
33.03k
16.73k (x0.51)
Test#2 (FP)
29.52k
24.74k (x0.84)
Test#3 (Generic, ZIP)
6.55k
8.82k (x1.35)
Test#1 (Memory)
15.45k
22.22k (x1.44)
TOTAL
84.54k
72.51k (x0.86)

Multithread

i9-9900KF

3900X
Test#1 (Integers)
276.22k
248.24k (x0.9)
Test#2 (FP)
250.61k
309.66k (x1.24)
Test#3 (Generic, ZIP)
57.2k
140.01k (x2.45)
Test#1 (Memory)
8.84k
58.39k (x6.61)
TOTAL
592.86k
756.3k (x1.28)

Performance/W
i9-9900KF
3900X
Test#1 (Integers)
2908 points/W
2364 points/W
Test#2 (FP)
2638 points/W
2949 points/W
Test#3 (Generic, ZIP)
602 points/W
1333 points/W
Test#1 (Memory)
93 points/W
556 points/W
TOTAL
6241 points/W
7203 points/W

Performance/GHz
i9-9900KF
3900X
Test#1 (Integers)
6605 points/GHz
3638 points/GHz
Test#2 (FP)
5904 points/GHz
5377 points/GHz
Test#3 (Generic, ZIP)
1309 points/GHz
1917 points/GHz
Test#1 (Memory)
3090 points/GHz
4831 points/GHz
TOTAL
16909 points/GHz
15763 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