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Core i7-6700K vs i9-10980XE


Description
The i7-6700K is based on Skylake architecture while the i9-10980XE is based on Cascade Lake.

Using the multithread performance as a reference, the i7-6700K gets a score of 254.6 k points while the i9-10980XE gets 1241.1 k points.

Summarizing, the i9-10980XE is 4.9 times faster than the i7-6700K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
50657
Core
Skylake-S
Cascade Lake-X
Architecture
Base frecuency
4 GHz
3 GHz
Boost frecuency
4.2 GHz
4.8 GHz
Socket
LGA 1151
LGA 2066
Cores/Threads
4/8
18/36
TDP
95 W
165 W
Cache L1 (d+i)
4x32+4x32 kB
18x32+18x32 kB
Cache L2
256 kB
18x1024 kB
Cache L3
8192 kB
25344 kB
Date
May 2015
November 2019
Mean monothread perf.
63.22k points
68.33k points
Mean multithread perf.
254.56k points
1241.12k points

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
i7-6700K
i9-10980XE
Test#1 (Integers)
4.07k
4.52k (x1.11)
Test#2 (FP)
16.62k
17.94k (x1.08)
Test#3 (Generic, ZIP)
5.23k
5.5k (x1.05)
Test#1 (Memory)
6.28k
9.64k (x1.54)
TOTAL
32.2k
37.6k (x1.17)

Multithread

i7-6700K

i9-10980XE
Test#1 (Integers)
16.37k
84.93k (x5.19)
Test#2 (FP)
77.34k
409.55k (x5.3)
Test#3 (Generic, ZIP)
25.65k
122.88k (x4.79)
Test#1 (Memory)
10.21k
22.12k (x2.17)
TOTAL
129.57k
639.48k (x4.94)

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
i7-6700K
i9-10980XE
Test#1 (Integers)
14.73k
16.03k (x1.09)
Test#2 (FP)
21.27k
23.95k (x1.13)
Test#3 (Generic, ZIP)
5.52k
6.03k (x1.09)
Test#1 (Memory)
6.32k
9.37k (x1.48)
TOTAL
47.84k
55.38k (x1.16)

Multithread

i7-6700K

i9-10980XE
Test#1 (Integers)
61.09k
316.11k (x5.17)
Test#2 (FP)
99.17k
503.75k (x5.08)
Test#3 (Generic, ZIP)
26.57k
131.82k (x4.96)
Test#1 (Memory)
10.26k
22.24k (x2.17)
TOTAL
197.09k
973.92k (x4.94)

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
i7-6700K
i9-10980XE
Test#1 (Integers)
25.78k
29.53k (x1.15)
Test#2 (FP)
23.08k
22.59k (x0.98)
Test#3 (Generic, ZIP)
5.32k
5.99k (x1.12)
Test#1 (Memory)
9.03k
10.22k (x1.13)
TOTAL
63.22k
68.33k (x1.08)

Multithread

i7-6700K

i9-10980XE
Test#1 (Integers)
112.83k
587.06k (x5.2)
Test#2 (FP)
106.86k
496.41k (x4.65)
Test#3 (Generic, ZIP)
25.76k
134.66k (x5.23)
Test#1 (Memory)
9.12k
22.99k (x2.52)
TOTAL
254.56k
1241.12k (x4.88)

Performance/W
i7-6700K
i9-10980XE
Test#1 (Integers)
1188 points/W
3558 points/W
Test#2 (FP)
1125 points/W
3009 points/W
Test#3 (Generic, ZIP)
271 points/W
816 points/W
Test#1 (Memory)
96 points/W
139 points/W
TOTAL
2680 points/W
7522 points/W

Performance/GHz
i7-6700K
i9-10980XE
Test#1 (Integers)
6139 points/GHz
6153 points/GHz
Test#2 (FP)
5495 points/GHz
4707 points/GHz
Test#3 (Generic, ZIP)
1268 points/GHz
1248 points/GHz
Test#1 (Memory)
2150 points/GHz
2129 points/GHz
TOTAL
15052 points/GHz
14236 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