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Core i7-6600U vs i7-2640M


Description
The i7-6600U is based on Skylake architecture while the i7-2640M 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 i7-2640M gets 54.9 k points.

Summarizing, the i7-2640M is 1.2 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
2.8 GHz
Boost frecuency
3.4 GHz
3.5 GHz
Socket
BGA1356
PGA 988B
Cores/Threads
2/4
2/4
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
4096 kB
Date
September 2015
September 2011
Mean monothread perf.
39.73k points
25.86k points
Mean multithread perf.
79.22k points
54.86k points

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
i7-2640M
Test#1 (Integers)
8.49k
9.63k (x1.13)
Test#2 (FP)
10.92k
8.33k (x0.76)
Test#3 (Generic, ZIP)
2.76k
4.08k (x1.48)
Test#1 (Memory)
4.93k
3.82k (x0.78)
TOTAL
27.1k
25.86k (x0.95)

Multithread

i7-6600U

i7-2640M
Test#1 (Integers)
14.11k
21.22k (x1.5)
Test#2 (FP)
20.05k
19.6k (x0.98)
Test#3 (Generic, ZIP)
6.17k
10.09k (x1.64)
Test#1 (Memory)
4.73k
3.94k (x0.83)
TOTAL
45.05k
54.86k (x1.22)

Performance/W
i7-6600U
i7-2640M
Test#1 (Integers)
940 points/W
606 points/W
Test#2 (FP)
1337 points/W
560 points/W
Test#3 (Generic, ZIP)
411 points/W
288 points/W
Test#1 (Memory)
315 points/W
112 points/W
TOTAL
3004 points/W
1567 points/W

Performance/GHz
i7-6600U
i7-2640M
Test#1 (Integers)
2497 points/GHz
2752 points/GHz
Test#2 (FP)
3211 points/GHz
2380 points/GHz
Test#3 (Generic, ZIP)
813 points/GHz
1165 points/GHz
Test#1 (Memory)
1449 points/GHz
1092 points/GHz
TOTAL
7970 points/GHz
7390 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