Core i7-6700K vs i9-7980XE
Description
Both models i7-6700K and i9-7980XE are based on Skylake architecture.
Sky Lake is also known as 6th generation Core. Include Thunderbolt 3.0, SATA Express and Iris Pro graphics with DirectX 12. It uses LGA 1151 socket for mainstream models and LGA 2066 for X-Series. Sky Lake comes with AVX2 support in all mainstreams CPUs and AVX-512 in some high end models.
Using the multithread performance as a reference, the i7-6700K gets a score of 254.6 k points while the i9-7980XE gets 1223.8 k points.
Summarizing, the i9-7980XE is 4.8 times faster than the i7-6700K . To get a proper comparison between both models, take a look to the data shown below.
Sky Lake is also known as 6th generation Core. Include Thunderbolt 3.0, SATA Express and Iris Pro graphics with DirectX 12. It uses LGA 1151 socket for mainstream models and LGA 2066 for X-Series. Sky Lake comes with AVX2 support in all mainstreams CPUs and AVX-512 in some high end models.
Using the multithread performance as a reference, the i7-6700K gets a score of 254.6 k points while the i9-7980XE gets 1223.8 k points.
Summarizing, the i9-7980XE is 4.8 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
50654
Core
Skylake-S
Skylake-X
Base frecuency
4 GHz
2.6 GHz
Boost frecuency
4.2 GHz
4.4 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
May 2017
Mean monothread perf.
63.22k points
76.43k points
Mean multithread perf.
254.56k points
1223.79k 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
i9-7980XE
Test#1 (Integers)
4.07k
4.89k (x1.2)
Test#2 (FP)
16.62k
19.98k (x1.2)
Test#3 (Generic, ZIP)
5.23k
6.14k (x1.18)
Test#1 (Memory)
6.28k
9.81k (x1.56)
TOTAL
32.2k
40.82k (x1.27)
Multithread
i7-6700K
i9-7980XE
Test#1 (Integers)
16.37k
79.8k (x4.88)
Test#2 (FP)
77.34k
372.72k (x4.82)
Test#3 (Generic, ZIP)
25.65k
121.42k (x4.73)
Test#1 (Memory)
10.21k
26.48k (x2.59)
TOTAL
129.57k
600.43k (x4.63)
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
i9-7980XE
Test#1 (Integers)
25.78k
31.16k (x1.21)
Test#2 (FP)
23.08k
28.13k (x1.22)
Test#3 (Generic, ZIP)
5.32k
6.65k (x1.25)
Test#1 (Memory)
9.03k
10.5k (x1.16)
TOTAL
63.22k
76.43k (x1.21)
Multithread
i7-6700K
i9-7980XE
Test#1 (Integers)
112.83k
560.19k (x4.97)
Test#2 (FP)
106.86k
516.97k (x4.84)
Test#3 (Generic, ZIP)
25.76k
123.94k (x4.81)
Test#1 (Memory)
9.12k
22.69k (x2.49)
TOTAL
254.56k
1223.79k (x4.81)
Performance/W
i7-6700K
i9-7980XE
Test#1 (Integers)
1188 points/W
3395 points/W
Test#2 (FP)
1125 points/W
3133 points/W
Test#3 (Generic, ZIP)
271 points/W
751 points/W
Test#1 (Memory)
96 points/W
137 points/W
TOTAL
2680 points/W
7417 points/W
Performance/GHz
i7-6700K
i9-7980XE
Test#1 (Integers)
6139 points/GHz
7081 points/GHz
Test#2 (FP)
5495 points/GHz
6392 points/GHz
Test#3 (Generic, ZIP)
1268 points/GHz
1512 points/GHz
Test#1 (Memory)
2150 points/GHz
2386 points/GHz
TOTAL
15052 points/GHz
17371 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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4