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Xeon E5472 vs E5645


Description
The E5472 is based on Core architecture while the E5645 is based on Westmere.

Using the multithread performance as a reference, the E5472 gets a score of 48.6 k points while the E5645 gets 77 k points.

Summarizing, the E5645 is 1.6 times faster than the E5472. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
10676
206c2
Core
Harpertown
Westmere-EP
Architecture
Base frecuency
3 GHz
2.4 GHz
Boost frecuency
3 GHz
2.8 GHz
Socket
LGA-771
LGA 1366
Cores/Threads
4/4
6 /6
TDP
80 W
80 W
Cache L1 (d+i)
4x32+4x32 kB
64 kB
Cache L2
2x6144 kB
256 kB
Cache L3
kB
12288 kB
Date
November 2007
March 2010
Mean monothread perf.
16.62k points
15.64k points
Mean multithread perf.
48.62k points
76.96k 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
E5472
E5645
Test#1 (Integers)
2.29k
1.78k (x0.78)
Test#2 (FP)
5.85k
3.91k (x0.67)
Test#3 (Generic, ZIP)
2.44k
2.52k (x1.03)
Test#1 (Memory)
4.81k
2.42k (x0.5)
TOTAL
15.39k
10.64k (x0.69)

Multithread

E5472

E5645
Test#1 (Integers)
9.06k
9.67k (x1.07)
Test#2 (FP)
23.09k
22.92k (x0.99)
Test#3 (Generic, ZIP)
9.7k
14.31k (x1.48)
Test#1 (Memory)
2.53k
3.81k (x1.51)
TOTAL
44.38k
50.7k (x1.14)

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
E5472
E5645
Test#1 (Integers)
2.88k
6.47k (x2.24)
Test#2 (FP)
6.36k
4.4k (x0.69)
Test#3 (Generic, ZIP)
2.55k
2.43k (x0.95)
Test#1 (Memory)
4.83k
2.33k (x0.48)
TOTAL
16.62k
15.64k (x0.94)

Multithread

E5472

E5645
Test#1 (Integers)
11.19k
34.43k (x3.08)
Test#2 (FP)
24.85k
24.23k (x0.98)
Test#3 (Generic, ZIP)
10.04k
14.48k (x1.44)
Test#1 (Memory)
2.54k
3.81k (x1.5)
TOTAL
48.62k
76.96k (x1.58)

Performance/W
E5472
E5645
Test#1 (Integers)
140 points/W
430 points/W
Test#2 (FP)
311 points/W
303 points/W
Test#3 (Generic, ZIP)
125 points/W
181 points/W
Test#1 (Memory)
32 points/W
48 points/W
TOTAL
608 points/W
962 points/W

Performance/GHz
E5472
E5645
Test#1 (Integers)
961 points/GHz
2311 points/GHz
Test#2 (FP)
2119 points/GHz
1573 points/GHz
Test#3 (Generic, ZIP)
850 points/GHz
867 points/GHz
Test#1 (Memory)
1610 points/GHz
833 points/GHz
TOTAL
5539 points/GHz
5584 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