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Core 2 Duo E7400 vs Core i7-6600U


Description
The E7400 is based on Core architecture while the i7-6600U is based on Skylake.

Using the multithread performance as a reference, the E7400 gets a score of 25.7 k points while the i7-6600U gets 48.2 k points.

Summarizing, the i7-6600U is 1.9 times faster than the E7400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
1067a
406e3
Core
Wolfdale
Skylake-U
Architecture
Base frecuency
2.8 GHz
2.6 GHz
Boost frecuency
2.8 GHz
3.4 GHz
Socket
LGA 775
BGA1356
Cores/Threads
2/2
2/4
TDP
65 W
15 W
Cache L1 (d+i)
32+32 kB
2x32+2x32 kB
Cache L2
3072 kB
2x256 kB
Cache L3
0 kB
4096 kB
Date
October 2008
September 2015
Mean monothread perf.
14.31k points
39.73k points
Mean multithread perf.
25.71k points
79.22k 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
E7400
i7-6600U
Test#1 (Integers)
2.54k
2.75k (x1.08)
Test#2 (FP)
6.56k
12.23k (x1.86)
Test#3 (Generic, ZIP)
2.73k
3.9k (x1.43)
Test#1 (Memory)
1.83k
5.61k (x3.06)
TOTAL
13.66k
24.48k (x1.79)

Multithread

E7400

i7-6600U
Test#1 (Integers)
5.08k
5.23k (x1.03)
Test#2 (FP)
13.07k
25k (x1.91)
Test#3 (Generic, ZIP)
5.52k
8.98k (x1.63)
Test#1 (Memory)
1.62k
4.73k (x2.91)
TOTAL
25.29k
43.95k (x1.74)

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
E7400
i7-6600U
Test#1 (Integers)
3.19k
6.76k (x2.12)
Test#2 (FP)
7.02k
9.58k (x1.36)
Test#3 (Generic, ZIP)
2.71k
2.46k (x0.91)
Test#1 (Memory)
1.39k
4.18k (x3.01)
TOTAL
14.31k
22.99k (x1.61)

Multithread

E7400

i7-6600U
Test#1 (Integers)
6.02k
14.37k (x2.39)
Test#2 (FP)
13.23k
23.79k (x1.8)
Test#3 (Generic, ZIP)
5.12k
5.71k (x1.11)
Test#1 (Memory)
1.34k
4.29k (x3.2)
TOTAL
25.71k
48.16k (x1.87)

Performance/W
E7400
i7-6600U
Test#1 (Integers)
93 points/W
958 points/W
Test#2 (FP)
204 points/W
1586 points/W
Test#3 (Generic, ZIP)
79 points/W
380 points/W
Test#1 (Memory)
21 points/W
286 points/W
TOTAL
396 points/W
3211 points/W

Performance/GHz
E7400
i7-6600U
Test#1 (Integers)
1139 points/GHz
1989 points/GHz
Test#2 (FP)
2507 points/GHz
2818 points/GHz
Test#3 (Generic, ZIP)
969 points/GHz
724 points/GHz
Test#1 (Memory)
496 points/GHz
1229 points/GHz
TOTAL
5111 points/GHz
6761 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