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Core i7-7700K vs i9-10940X


Description
The i7-7700K is based on Kaby Lake architecture while the i9-10940X is based on Cascade Lake.

Using the multithread performance as a reference, the i7-7700K gets a score of 291.1 k points while the i9-10940X gets 1088.1 k points.

Summarizing, the i9-10940X is 3.7 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
50657
Core
Kaby Lake-S
Cascade Lake-X
Architecture
Base frecuency
4.2 GHz
3.3 GHz
Boost frecuency
4.5 GHz
4.8 GHz
Socket
LGA 1151
LGA 2066
Cores/Threads
4/8
14/28
TDP
95 W
165 W
Cache L1 (d+i)
32+32 kB
14x32+14x32 kB
Cache L2
256 kB
14x1024 kB
Cache L3
8192 kB
19712 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
i9-10940X
Test#1 (Integers)
30864
29746 (-3.62%)
Test#2 (FP)
27262
27440 (0.66%)
Test#3 (Generic, ZIP)
6421
5809 (-9.53%)
Test#1 (Memory)
13994
9047 (-35.35%)
TOTAL
78541
72043 (-8.27%)

Multithread

i7-7700K

i9-10940X
Test#1 (Integers)
129531
485371 (274.71%)
Test#2 (FP)
122200
472703 (286.83%)
Test#3 (Generic, ZIP)
29617
113090 (281.84%)
Test#1 (Memory)
9751
16945 (73.78%)
TOTAL
291099
1088110 (273.79%)

Performance/W
i7-7700K
i9-10940X
Test#1 (Integers)
1363 points/W
2942 points/W
Test#2 (FP)
1286 points/W
2865 points/W
Test#3 (Generic, ZIP)
312 points/W
685 points/W
Test#1 (Memory)
103 points/W
103 points/W
TOTAL
3064 points/W
6595 points/W

Performance/GHz
i7-7700K
i9-10940X
Test#1 (Integers)
6859 points/GHz
6197 points/GHz
Test#2 (FP)
6058 points/GHz
5717 points/GHz
Test#3 (Generic, ZIP)
1427 points/GHz
1210 points/GHz
Test#1 (Memory)
3110 points/GHz
1885 points/GHz
TOTAL
17453 points/GHz
15009 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