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Xeon E5645 vs Core i5-520M


Description
Both models E5645 and i5-520M are based on Westmere architecture.



Using the multithread performance as a reference, the E5645 gets a score of 77 k points while the i5-520M gets 33.1 k points.

Summarizing, the E5645 is 2.3 times faster than the i5-520M. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
206c2
20652
Core
Westmere-EP
Arrandale
Architecture
Base frecuency
2.4 GHz
2.4 GHz
Boost frecuency
2.8 GHz
2.933 GHz
Socket
LGA 1366
FC-PGA 988
Cores/Threads
6 /6
2/4
TDP
80 W
35 W
Cache L1 (d+i)
64 kB
2x32+2x32 kB
Cache L2
256 kB
2x256 kB
Cache L3
12288 kB
3072 kB
Date
March 2010
January 2010
Mean monothread perf.
15.64k points
15.93k points
Mean multithread perf.
76.96k points
33.14k 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
E5645
i5-520M
Test#1 (Integers)
6.47k
6.67k (x1.03)
Test#2 (FP)
4.4k
4.59k (x1.04)
Test#3 (Generic, ZIP)
2.43k
2.49k (x1.03)
Test#1 (Memory)
2.33k
2.18k (x0.93)
TOTAL
15.64k
15.93k (x1.02)

Multithread

E5645

i5-520M
Test#1 (Integers)
34.43k
13.75k (x0.4)
Test#2 (FP)
24.23k
10.03k (x0.41)
Test#3 (Generic, ZIP)
14.48k
6.67k (x0.46)
Test#1 (Memory)
3.81k
2.68k (x0.7)
TOTAL
76.96k
33.14k (x0.43)

Performance/W
E5645
i5-520M
Test#1 (Integers)
430 points/W
393 points/W
Test#2 (FP)
303 points/W
287 points/W
Test#3 (Generic, ZIP)
181 points/W
191 points/W
Test#1 (Memory)
48 points/W
77 points/W
TOTAL
962 points/W
947 points/W

Performance/GHz
E5645
i5-520M
Test#1 (Integers)
2311 points/GHz
2275 points/GHz
Test#2 (FP)
1573 points/GHz
1567 points/GHz
Test#3 (Generic, ZIP)
867 points/GHz
849 points/GHz
Test#1 (Memory)
833 points/GHz
742 points/GHz
TOTAL
5584 points/GHz
5433 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