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Core 2 Duo E7400 vs Core i7-640LM


Description
The E7400 is based on Core architecture while the i7-640LM is based on Westmere.

Using the multithread performance as a reference, the E7400 gets a score of 25.7 k points while the i7-640LM gets 31.7 k points.

Summarizing, the i7-640LM is 1.2 times faster than the E7400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
1067a
20655
Core
Wolfdale
Calpella
Architecture
Base frecuency
2.8 GHz
2.133 GHz
Boost frecuency
2.8 GHz
2.667 GHz
Socket
LGA 775
BGA1288
Cores/Threads
2/2
2/4
TDP
65 W
25 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
January 2010
Mean monothread perf.
14.31k points
16.35k points
Mean multithread perf.
25.71k points
31.74k points

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
i7-640LM
Test#1 (Integers)
3.19k
7.01k (x2.2)
Test#2 (FP)
7.02k
4.58k (x0.65)
Test#3 (Generic, ZIP)
2.71k
2.73k (x1.01)
Test#1 (Memory)
1.39k
2.03k (x1.46)
TOTAL
14.31k
16.35k (x1.14)

Multithread

E7400

i7-640LM
Test#1 (Integers)
6.02k
12.93k (x2.15)
Test#2 (FP)
13.23k
10.21k (x0.77)
Test#3 (Generic, ZIP)
5.12k
6.22k (x1.21)
Test#1 (Memory)
1.34k
2.37k (x1.76)
TOTAL
25.71k
31.74k (x1.23)

Performance/W
E7400
i7-640LM
Test#1 (Integers)
93 points/W
517 points/W
Test#2 (FP)
204 points/W
409 points/W
Test#3 (Generic, ZIP)
79 points/W
249 points/W
Test#1 (Memory)
21 points/W
95 points/W
TOTAL
396 points/W
1269 points/W

Performance/GHz
E7400
i7-640LM
Test#1 (Integers)
1139 points/GHz
2627 points/GHz
Test#2 (FP)
2507 points/GHz
1718 points/GHz
Test#3 (Generic, ZIP)
969 points/GHz
1024 points/GHz
Test#1 (Memory)
496 points/GHz
762 points/GHz
TOTAL
5111 points/GHz
6130 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