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Core i7-6600U vs i5-2520M


Description
The i7-6600U is based on Skylake architecture while the i5-2520M is based on Sandy Bridge.

Using the multithread performance as a reference, the i7-6600U gets a score of 45.1 k points while the i5-2520M gets 50.2 k points.

Summarizing, the i5-2520M is 1.1 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
206a7
Core
Skylake-U
Sandy Bridge
Architecture
Base frecuency
2.6 GHz
2.5 GHz
Boost frecuency
3.4 GHz
3.2 GHz
Socket
BGA1356
BGA1023
Cores/Threads
2/4
2/2
TDP
15 W
35 W
Cache L1 (d+i)
2x32+2x32 kB
2x32+2x32 kB
Cache L2
2x256 kB
2x256 kB
Cache L3
4096 kB
3072 kB
Date
September 2015
February 2011
Mean monothread perf.
39.73k points
24.13k points
Mean multithread perf.
79.22k points
50.23k 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
i5-2520M
Test#1 (Integers)
2.75k
2.69k (x0.98)
Test#2 (FP)
12.23k
7.28k (x0.6)
Test#3 (Generic, ZIP)
3.9k
3.84k (x0.98)
Test#1 (Memory)
5.61k
3.05k (x0.54)
TOTAL
24.48k
16.86k (x0.69)

Multithread

i7-6600U

i5-2520M
Test#1 (Integers)
5.23k
6.08k (x1.16)
Test#2 (FP)
25k
16.15k (x0.65)
Test#3 (Generic, ZIP)
8.98k
8.87k (x0.99)
Test#1 (Memory)
4.73k
3.06k (x0.65)
TOTAL
43.95k
34.15k (x0.78)

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
i5-2520M
Test#1 (Integers)
8.49k
9.04k (x1.07)
Test#2 (FP)
10.92k
8.03k (x0.74)
Test#3 (Generic, ZIP)
2.76k
4.06k (x1.47)
Test#1 (Memory)
4.93k
2.99k (x0.61)
TOTAL
27.1k
24.13k (x0.89)

Multithread

i7-6600U

i5-2520M
Test#1 (Integers)
14.11k
19.82k (x1.4)
Test#2 (FP)
20.05k
18.12k (x0.9)
Test#3 (Generic, ZIP)
6.17k
9.23k (x1.5)
Test#1 (Memory)
4.73k
3.06k (x0.65)
TOTAL
45.05k
50.23k (x1.11)

Performance/W
i7-6600U
i5-2520M
Test#1 (Integers)
940 points/W
566 points/W
Test#2 (FP)
1337 points/W
518 points/W
Test#3 (Generic, ZIP)
411 points/W
264 points/W
Test#1 (Memory)
315 points/W
88 points/W
TOTAL
3004 points/W
1435 points/W

Performance/GHz
i7-6600U
i5-2520M
Test#1 (Integers)
2497 points/GHz
2826 points/GHz
Test#2 (FP)
3211 points/GHz
2510 points/GHz
Test#3 (Generic, ZIP)
813 points/GHz
1269 points/GHz
Test#1 (Memory)
1449 points/GHz
935 points/GHz
TOTAL
7970 points/GHz
7540 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