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Core i7-4790 vs i7-6700K


Description
The i7-4790 is based on Haswell architecture while the i7-6700K is based on Skylake.

Using the multithread performance as a reference, the i7-4790 gets a score of 173.9 k points while the i7-6700K gets 254.6 k points.

Summarizing, the i7-6700K is 1.5 times faster than the i7-4790 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
306c3
506e3
Core
Haswell
Skylake-S
Architecture
Base frecuency
3.6 GHz
4 GHz
Boost frecuency
4 GHz
4.2 GHz
Socket
LGA 1150
LGA 1151
Cores/Threads
4/8
4/8
TDP
84 W
95 W
Cache L1 (d+i)
32+32 kB
4x32+4x32 kB
Cache L2
256 kB
256 kB
Cache L3
8192 kB
8192 kB
Date
May 2014
May 2015
Mean monothread perf.
44.73k points
63.22k points
Mean multithread perf.
173.89k points
254.56k 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
i7-4790
i7-6700K
Test#1 (Integers)
4.51k
4.07k (x0.9)
Test#2 (FP)
11.24k
16.62k (x1.48)
Test#3 (Generic, ZIP)
5.03k
5.23k (x1.04)
Test#1 (Memory)
5.02k
6.28k (x1.25)
TOTAL
25.8k
32.2k (x1.25)

Multithread

i7-4790

i7-6700K
Test#1 (Integers)
15.72k
16.37k (x1.04)
Test#2 (FP)
54.99k
77.34k (x1.41)
Test#3 (Generic, ZIP)
23.87k
25.65k (x1.07)
Test#1 (Memory)
5.48k
10.21k (x1.86)
TOTAL
100.06k
129.57k (x1.29)

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
i7-4790
i7-6700K
Test#1 (Integers)
13.52k
14.73k (x1.09)
Test#2 (FP)
11.94k
21.27k (x1.78)
Test#3 (Generic, ZIP)
4.96k
5.52k (x1.11)
Test#1 (Memory)
4.84k
6.32k (x1.31)
TOTAL
35.25k
47.84k (x1.36)

Multithread

i7-4790

i7-6700K
Test#1 (Integers)
54.7k
61.09k (x1.12)
Test#2 (FP)
52.41k
99.17k (x1.89)
Test#3 (Generic, ZIP)
24.5k
26.57k (x1.08)
Test#1 (Memory)
6.77k
10.26k (x1.52)
TOTAL
138.37k
197.09k (x1.42)

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
i7-4790
i7-6700K
Test#1 (Integers)
22.19k
25.78k (x1.16)
Test#2 (FP)
12.45k
23.08k (x1.85)
Test#3 (Generic, ZIP)
5.11k
5.32k (x1.04)
Test#1 (Memory)
4.98k
9.03k (x1.82)
TOTAL
44.73k
63.22k (x1.41)

Multithread

i7-4790

i7-6700K
Test#1 (Integers)
87.14k
112.83k (x1.29)
Test#2 (FP)
58k
106.86k (x1.84)
Test#3 (Generic, ZIP)
22.75k
25.76k (x1.13)
Test#1 (Memory)
6k
9.12k (x1.52)
TOTAL
173.89k
254.56k (x1.46)

Performance/W
i7-4790
i7-6700K
Test#1 (Integers)
1037 points/W
1188 points/W
Test#2 (FP)
691 points/W
1125 points/W
Test#3 (Generic, ZIP)
271 points/W
271 points/W
Test#1 (Memory)
71 points/W
96 points/W
TOTAL
2070 points/W
2680 points/W

Performance/GHz
i7-4790
i7-6700K
Test#1 (Integers)
5547 points/GHz
6139 points/GHz
Test#2 (FP)
3113 points/GHz
5495 points/GHz
Test#3 (Generic, ZIP)
1279 points/GHz
1268 points/GHz
Test#1 (Memory)
1244 points/GHz
2150 points/GHz
TOTAL
11183 points/GHz
15052 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