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Xeon E5645 vs Virtual CPU 2,84GHz


Description
The E5645 is based on Westmere architecture while the 2,84GHz is based on -.

Using the multithread performance as a reference, the E5645 gets a score of 77 k points while the 2,84GHz gets 79.8 k points.

Summarizing, the 2,84GHz is 1 times faster than the E5645 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
206c2
f4a
Core
Westmere-EP
-
Architecture
Westmere
Base frecuency
2.4 GHz
2.84 GHz
Boost frecuency
2.8 GHz
2.84 GHz
Socket
LGA 1366
-
Cores/Threads
6 /6
8/8
TDP
80 W
- W
Cache L1 (d+i)
64 kB
- kB
Cache L2
256 kB
- kB
Cache L3
12288 kB
- kB
Date
March 2010
-
Mean monothread perf.
15.64k points
21.22k points
Mean multithread perf.
76.96k points
79.76k 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
2,84GHz
Test#1 (Integers)
6.47k
4.27k (x0.66)
Test#2 (FP)
4.4k
8.93k (x2.03)
Test#3 (Generic, ZIP)
2.43k
2.79k (x1.15)
Test#1 (Memory)
2.33k
5.23k (x2.24)
TOTAL
15.64k
21.22k (x1.36)

Multithread

E5645

2,84GHz
Test#1 (Integers)
34.43k
19.35k (x0.56)
Test#2 (FP)
24.23k
40.57k (x1.67)
Test#3 (Generic, ZIP)
14.48k
13.15k (x0.91)
Test#1 (Memory)
3.81k
6.7k (x1.76)
TOTAL
76.96k
79.76k (x1.04)

Performance/W
E5645
2,84GHz
Test#1 (Integers)
430 points/W