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Core i7-7700K vs Ryzen 9 3900


Description
The i7-7700K is based on Kaby Lake architecture while the 3900 is based on Zen 2.

Using the multithread performance as a reference, the i7-7700K gets a score of 291.1 k points while the 3900 gets 687.5 k points.

Summarizing, the 3900 is 2.4 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
870f10
Core
Kaby Lake-S
Matisse
Architecture
Base frecuency
4.2 GHz
3.1 GHz
Boost frecuency
4.5 GHz
4.3 GHz
Socket
LGA 1151
AM4
Cores/Threads
4/8
12/24
TDP
95 W
65 W
Cache L1 (d+i)
32+32 kB
12x32+12x32 kB
Cache L2
256 kB
12x512 kB
Cache L3
8192 kB
4x16384 kB
Date
September 2016
September 2019

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
3900
Test#1 (Integers)
4629
4388 (-5.21%)
Test#2 (FP)
18925
16990 (-10.22%)
Test#3 (Generic, ZIP)
6221
7741 (24.43%)
Test#1 (Memory)
13922
24572 (76.49%)
TOTAL
43698
53691 (22.87%)

Multithread

i7-7700K

3900
Test#1 (Integers)
18529
48447 (161.46%)
Test#2 (FP)
86487
230813 (166.88%)
Test#3 (Generic, ZIP)
28778
122817 (326.77%)
Test#1 (Memory)
9674
54726 (465.70%)
TOTAL
143468
456802 (218.40%)

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
3900
Test#1 (Integers)
17549
16159 (-7.92%)
Test#2 (FP)
27822
23754 (-14.62%)
Test#3 (Generic, ZIP)
6796
9320 (37.14%)
Test#1 (Memory)
14832
23170 (56.22%)
TOTAL
66999
72403 (8.07%)

Multithread

i7-7700K

3900
Test#1 (Integers)
68395
174727 (155.47%)
Test#2 (FP)
118805
275632 (132.00%)
Test#3 (Generic, ZIP)
33336
125649 (276.91%)
Test#1 (Memory)
17434
44172 (153.37%)
TOTAL
237970
620179 (160.61%)

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
3900
Test#1 (Integers)
30864
16854 (-45.39%)
Test#2 (FP)
27262
26031 (-4.51%)
Test#3 (Generic, ZIP)
6421
9539 (48.56%)
Test#1 (Memory)
13994
22546 (61.11%)
TOTAL
78541
74970 (-4.55%)

Multithread

i7-7700K

3900
Test#1 (Integers)
129531
229408 (77.11%)
Test#2 (FP)
122200
292810 (139.62%)
Test#3 (Generic, ZIP)
29617
128480 (333.81%)
Test#1 (Memory)
9751
36801 (277.40%)
TOTAL
291099
687500 (136.17%)

Performance/W
i7-7700K
3900
Test#1 (Integers)
1363 points/W
3529 points/W
Test#2 (FP)
1286 points/W
4505 points/W
Test#3 (Generic, ZIP)
312 points/W
1977 points/W
Test#1 (Memory)
103 points/W
566 points/W
TOTAL
3064 points/W
10577 points/W

Performance/GHz
i7-7700K
3900
Test#1 (Integers)
6859 points/GHz
3920 points/GHz
Test#2 (FP)
6058 points/GHz
6054 points/GHz
Test#3 (Generic, ZIP)
1427 points/GHz
2218 points/GHz
Test#1 (Memory)
3110 points/GHz
5243 points/GHz
TOTAL
17453 points/GHz
17435 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