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Core i7-8700k vs Ryzen 7 3800X


Description
The i7-8700k is based on Coffee Lake architecture while the 3800X is based on Zen 2.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the 3800X gets 501.7 k points.

Summarizing, the 3800X is 1.1 times faster than the i7-8700k. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
870f10
Core
Coffee Lake-S
Matisse
Architecture
Base frecuency
3.7 GHz
3.9 GHz
Boost frecuency
4.7 GHz
4.5 GHz
Socket
LGA 1151
AM4
Cores/Threads
6/12
8/16
TDP
95 W
105 W
Cache L1 (d+i)
6x32+6x32 kB
8x32+8x32 kB
Cache L2
6x256 kB
8x512 kB
Cache L3
12288 kB
32768 kB
Date
October 2017
July 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
i7-8700k
3800X
Test#1 (Integers)
4127
4474 (8.40%)
Test#2 (FP)
16959
17408 (2.65%)
Test#3 (Generic, ZIP)
5564
8230 (47.91%)
Test#1 (Memory)
12845
25149 (95.78%)
TOTAL
39495
55260 (39.92%)

Multithread

i7-8700k

3800X
Test#1 (Integers)
24011
36101 (50.35%)
Test#2 (FP)
108690
178651 (64.37%)
Test#3 (Generic, ZIP)
36616
95978 (162.12%)
Test#1 (Memory)
9327
16034 (71.91%)
TOTAL
178644
326764 (82.91%)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i7-8700k
3800X
Test#1 (Integers)
12920
17175 (32.93%)
Test#2 (FP)
20678
25320 (22.45%)
Test#3 (Generic, ZIP)
5295
8357 (57.82%)
Test#1 (Memory)
12587
27858 (121.33%)
TOTAL
51480
78708 (52.89%)

Multithread

i7-8700k

3800X
Test#1 (Integers)
94259
136062 (44.35%)
Test#2 (FP)
152549
195062 (27.87%)
Test#3 (Generic, ZIP)
39735
97815 (146.16%)
Test#1 (Memory)
8527
12912 (51.42%)
TOTAL
295071
441850 (49.74%)

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
i7-8700k
3800X
Test#1 (Integers)
16874
16756 (-0.69%)
Test#2 (FP)
26119
25162 (-3.66%)
Test#3 (Generic, ZIP)
6329
8759 (38.40%)
Test#1 (Memory)
13708
24304 (77.29%)
TOTAL
63030
74981 (18.96%)

Multithread

i7-8700k

3800X
Test#1 (Integers)
105740
131363 (24.23%)
Test#2 (FP)
180520
198512 (9.97%)
Test#3 (Generic, ZIP)
44994
97268 (116.18%)
Test#1 (Memory)
8512
13398 (57.41%)
TOTAL
339766
440541 (29.66%)

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
3800X
Test#1 (Integers)
31204
17064 (-45.31%)
Test#2 (FP)
27821
26219 (-5.76%)
Test#3 (Generic, ZIP)
6568
8811 (34.16%)
Test#1 (Memory)
15004
23190 (54.56%)
TOTAL
80598
75284 (-6.59%)

Multithread

i7-8700k

3800X
Test#1 (Integers)
202422
172726 (-14.67%)
Test#2 (FP)
186332
214480 (15.11%)
Test#3 (Generic, ZIP)
44958
97380 (116.60%)
Test#1 (Memory)
10054
17109 (70.18%)
TOTAL
443765
501695 (13.05%)

Performance/W
i7-8700k
3800X
Test#1 (Integers)
2131 points/W
1645 points/W
Test#2 (FP)
1961 points/W
2043 points/W
Test#3 (Generic, ZIP)
473 points/W
927 points/W
Test#1 (Memory)
106 points/W
163 points/W
TOTAL
4671 points/W
4778 points/W

Performance/GHz
i7-8700k
3800X
Test#1 (Integers)
6639 points/GHz
3792 points/GHz
Test#2 (FP)
5919 points/GHz
5826 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1958 points/GHz
Test#1 (Memory)
3192 points/GHz
5153 points/GHz
TOTAL
17148 points/GHz
16730 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