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Core i7-7700K vs Ryzen 9 3950X


Description
The i7-7700K is based on Kaby Lake architecture while the 3950X is based on Zen 2.

Using the multithread performance as a reference, the i7-7700K gets a score of 292.3 k points while the 3950X gets 944.1 k points.

Summarizing, the 3950X is 3.2 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
3.5 GHz
Boost frecuency
4.5 GHz
4.7 GHz
Socket
LGA 1151
AM4
Cores/Threads
4/8
16/32
TDP
95 W
105 W
Cache L1 (d+i)
32+32 kB
16x32+16x32 kB
Cache L2
256 kB
16x512 kB
Cache L3
8192 kB
4x16384 kB
Date
September 2016
November 2019

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
3950X
Test#1 (Integers)
30879
16951 (-45.10%)
Test#2 (FP)
27266
26801 (-1.71%)
Test#3 (Generic, ZIP)
6416
7939 (23.75%)
Test#1 (Memory)
14011
23136 (65.12%)
TOTAL
78572
74828 (-4.77%)

Multithread

i7-7700K

3950X
Test#1 (Integers)
130361
325542 (149.72%)
Test#2 (FP)
122434
421297 (244.10%)
Test#3 (Generic, ZIP)
29679
183022 (516.67%)
Test#1 (Memory)
9830
14205 (44.50%)
TOTAL
292304
944066 (222.97%)

Performance/W
i7-7700K
3950X
Test#1 (Integers)
1372 points/W
3100 points/W
Test#2 (FP)
1289 points/W
4012 points/W
Test#3 (Generic, ZIP)
312 points/W
1743 points/W
Test#1 (Memory)
103 points/W
135 points/W
TOTAL
3077 points/W
8991 points/W

Performance/GHz
i7-7700K
3950X
Test#1 (Integers)
6862 points/GHz
3607 points/GHz
Test#2 (FP)
6059 points/GHz
5702 points/GHz
Test#3 (Generic, ZIP)
1426 points/GHz
1689 points/GHz
Test#1 (Memory)
3114 points/GHz
4923 points/GHz
TOTAL
17460 points/GHz
15921 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