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Core i7-6500U vs i7-4790


Description
The i7-6500U is based on Skylake architecture while the i7-4790 is based on Haswell.

Using the multithread performance as a reference, the i7-6500U gets a score of 97.5 k points while the i7-4790 gets 173.9 k points.

Summarizing, the i7-4790 is 1.8 times faster than the i7-6500U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
406e3
306c3
Core
Skylake-U
Haswell
Architecture
Base frecuency
2.5 GHz
3.6 GHz
Boost frecuency
3.1 GHz
4 GHz
Socket
BGA1356
LGA 1150
Cores/Threads
2/4
4/8
TDP
15 W
84 W
Cache L1 (d+i)
2x32+2x32 kB
32+32 kB
Cache L2
4096 kB
256 kB
Cache L3
kB
8192 kB
Date
September 2015
May 2014
Mean monothread perf.
46.25k points
44.73k points
Mean multithread perf.
97.52k points
173.89k 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
i7-6500U
i7-4790
Test#1 (Integers)
2.98k
4.51k (x1.52)
Test#2 (FP)
12.19k
11.24k (x0.92)
Test#3 (Generic, ZIP)
3.91k
5.03k (x1.28)
Test#1 (Memory)
5.3k
5.02k (x0.95)
TOTAL
24.37k
25.8k (x1.06)

Multithread

i7-6500U

i7-4790
Test#1 (Integers)
6.1k
15.72k (x2.58)
Test#2 (FP)
28.73k
54.99k (x1.91)
Test#3 (Generic, ZIP)
9.56k
23.87k (x2.5)
Test#1 (Memory)
6.71k
5.48k (x0.82)
TOTAL
51.09k
100.06k (x1.96)

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
i7-6500U
i7-4790
Test#1 (Integers)
11.11k
13.52k (x1.22)
Test#2 (FP)
15.97k
11.94k (x0.75)
Test#3 (Generic, ZIP)
4.25k
4.96k (x1.17)
Test#1 (Memory)
5.66k
4.84k (x0.85)
TOTAL
36.99k
35.25k (x0.95)

Multithread

i7-6500U

i7-4790
Test#1 (Integers)
23.1k
54.7k (x2.37)
Test#2 (FP)
36.73k
52.41k (x1.43)
Test#3 (Generic, ZIP)
9.99k
24.5k (x2.45)
Test#1 (Memory)
7k
6.77k (x0.97)
TOTAL
76.82k
138.37k (x1.8)

AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
i7-6500U
i7-4790
Test#1 (Integers)
11.09k
14.07k (x1.27)
Test#2 (FP)
17.1k
12.63k (x0.74)
Test#3 (Generic, ZIP)
4.12k
5.35k (x1.3)
Test#1 (Memory)
5.58k
4.98k (x0.89)
TOTAL
37.9k
37.03k (x0.98)

Multithread

i7-6500U

i7-4790
Test#1 (Integers)
23.3k
57.88k (x2.48)
Test#2 (FP)
38.52k
60.83k (x1.58)
Test#3 (Generic, ZIP)
9.95k
24.4k (x2.45)
Test#1 (Memory)
6.95k
6.95k (x1)
TOTAL
78.72k
150.07k (x1.91)

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
i7-6500U
i7-4790
Test#1 (Integers)
19.47k
22.19k (x1.14)
Test#2 (FP)
17.58k
12.45k (x0.71)
Test#3 (Generic, ZIP)
4.05k
5.11k (x1.26)
Test#1 (Memory)
5.15k
4.98k (x0.97)
TOTAL
46.25k
44.73k (x0.97)

Multithread

i7-6500U

i7-4790
Test#1 (Integers)
42.05k
87.14k (x2.07)
Test#2 (FP)
40.2k
58k (x1.44)
Test#3 (Generic, ZIP)
9.4k
22.75k (x2.42)
Test#1 (Memory)
5.86k
6k (x1.02)
TOTAL
97.52k
173.89k (x1.78)

Performance/W
i7-6500U
i7-4790
Test#1 (Integers)
2803 points/W
1037 points/W
Test#2 (FP)
2680 points/W
691 points/W
Test#3 (Generic, ZIP)
626 points/W
271 points/W
Test#1 (Memory)
391 points/W
71 points/W
TOTAL
6501 points/W
2070 points/W

Performance/GHz
i7-6500U
i7-4790
Test#1 (Integers)
6279 points/GHz
5547 points/GHz
Test#2 (FP)
5672 points/GHz
3113 points/GHz
Test#3 (Generic, ZIP)
1305 points/GHz
1279 points/GHz
Test#1 (Memory)
1662 points/GHz
1244 points/GHz
TOTAL
14918 points/GHz
11183 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