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Core i7-6600U vs i5-6500


Description
Both models i7-6600U and i5-6500 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 i7-6600U gets a score of 79.2 k points while the i5-6500 gets 179.4 k points.

Summarizing, the i5-6500 is 2.3 times faster than the i7-6600U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
406e3
506e3
Core
Skylake-U
Skylake-S
Architecture
Base frecuency
2.6 GHz
3.2 GHz
Boost frecuency
3.4 GHz
3.6 GHz
Socket
BGA1356
LGA 1151
Cores/Threads
2/4
4/4
TDP
15 W
65 W
Cache L1 (d+i)
2x32+2x32 kB
4x32+4x32 kB
Cache L2
2x256 kB
4x256 kB
Cache L3
4096 kB
6144 kB
Date
September 2015
September 2015
Mean monothread perf.
39.73k points
53.7k points
Mean multithread perf.
79.22k points
179.44k 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
i7-6600U
i5-6500
Test#1 (Integers)
2.75k
3.46k (x1.26)
Test#2 (FP)
12.23k
14.61k (x1.19)
Test#3 (Generic, ZIP)
3.9k
4.66k (x1.19)
Test#1 (Memory)
5.61k
6.99k (x1.25)
TOTAL
24.48k
29.71k (x1.21)

Multithread

i7-6600U

i5-6500
Test#1 (Integers)
5.23k
12.52k (x2.39)
Test#2 (FP)
25k
51.13k (x2.05)
Test#3 (Generic, ZIP)
8.98k
17.41k (x1.94)
Test#1 (Memory)
4.73k
3.9k (x0.82)
TOTAL
43.95k
84.96k (x1.93)

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
i7-6600U
i5-6500
Test#1 (Integers)
8.49k
13.07k (x1.54)
Test#2 (FP)
10.92k
20.23k (x1.85)
Test#3 (Generic, ZIP)
2.76k
4.93k (x1.78)
Test#1 (Memory)
4.93k
9.2k (x1.87)
TOTAL
27.1k
47.43k (x1.75)

Multithread

i7-6600U

i5-6500
Test#1 (Integers)
14.11k
49.62k (x3.52)
Test#2 (FP)
20.05k
74.82k (x3.73)
Test#3 (Generic, ZIP)
6.17k
18.46k (x2.99)
Test#1 (Memory)
4.73k
4.21k (x0.89)
TOTAL
45.05k
147.12k (x3.27)

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
i7-6600U
i5-6500
Test#1 (Integers)
16.72k
22.89k (x1.37)
Test#2 (FP)
14.7k
19.87k (x1.35)
Test#3 (Generic, ZIP)
3.4k
4.58k (x1.35)
Test#1 (Memory)
4.9k
6.36k (x1.3)
TOTAL
39.73k
53.7k (x1.35)

Multithread

i7-6600U

i5-6500
Test#1 (Integers)
33.41k
84.36k (x2.52)
Test#2 (FP)
31.66k
72.91k (x2.3)
Test#3 (Generic, ZIP)
8.18k
16.08k (x1.96)
Test#1 (Memory)
5.97k
6.1k (x1.02)
TOTAL
79.22k
179.44k (x2.26)

Performance/W
i7-6600U
i5-6500
Test#1 (Integers)
2227 points/W
1298 points/W
Test#2 (FP)
2111 points/W
1122 points/W
Test#3 (Generic, ZIP)
546 points/W
247 points/W
Test#1 (Memory)
398 points/W
94 points/W
TOTAL
5282 points/W
2761 points/W

Performance/GHz
i7-6600U
i5-6500
Test#1 (Integers)
4919 points/GHz
6359 points/GHz
Test#2 (FP)
4325 points/GHz
5521 points/GHz
Test#3 (Generic, ZIP)
999 points/GHz
1271 points/GHz
Test#1 (Memory)
1441 points/GHz
1766 points/GHz
TOTAL
11684 points/GHz
14917 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