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Core i9-10940X vs i7-8700k


Description
The i9-10940X is based on Cascade Lake architecture while the i7-8700k is based on Coffee Lake.

Using the multithread performance as a reference, the i9-10940X gets a score of 1088.1 k points while the i7-8700k gets 443.8 k points.

Summarizing, the i9-10940X is 2.5 times faster than the i7-8700k. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
50657
906ea
Core
Cascade Lake-X
Coffee Lake-S
Architecture
Base frecuency
3.3 GHz
3.7 GHz
Boost frecuency
4.8 GHz
4.7 GHz
Socket
LGA 2066
LGA 1151
Cores/Threads
14/28
6/12
TDP
165 W
95 W
Cache L1 (d+i)
14x32+14x32 kB
6x32+6x32 kB
Cache L2
14x1024 kB
6x256 kB
Cache L3
19712 kB
12288 kB
Date
November 2019
October 2017
Mean monothread perf.
72.04k points
80.6k points
Mean multithread perf.
1088.11k points
443.77k 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
i9-10940X
i7-8700k
Test#1 (Integers)
29.75k
31.2k (x1.05)
Test#2 (FP)
27.44k
27.82k (x1.01)
Test#3 (Generic, ZIP)
5.81k
6.57k (x1.13)
Test#1 (Memory)
9.05k
15k (x1.66)
TOTAL
72.04k
80.6k (x1.12)

Multithread

i9-10940X

i7-8700k
Test#1 (Integers)
485.37k
202.42k (x0.42)
Test#2 (FP)
472.7k
186.33k (x0.39)
Test#3 (Generic, ZIP)
113.09k
44.96k (x0.4)
Test#1 (Memory)
16.95k
10.05k (x0.59)
TOTAL
1088.11k
443.77k (x0.41)

Performance/W
i9-10940X
i7-8700k
Test#1 (Integers)
2942 points/W
2131 points/W
Test#2 (FP)
2865 points/W
1961 points/W
Test#3 (Generic, ZIP)
685 points/W
473 points/W
Test#1 (Memory)
103 points/W
106 points/W
TOTAL
6595 points/W
4671 points/W

Performance/GHz
i9-10940X
i7-8700k
Test#1 (Integers)
6197 points/GHz
6639 points/GHz
Test#2 (FP)
5717 points/GHz
5919 points/GHz
Test#3 (Generic, ZIP)
1210 points/GHz
1397 points/GHz
Test#1 (Memory)
1885 points/GHz
3192 points/GHz
TOTAL
15009 points/GHz
17148 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