Xeon E5645 vs E5-2651 v2
Description
The E5645 is based on Westmere architecture while the E5-2651 v2 is based on Ivy Bridge.
Using the multithread performance as a reference, the E5645 gets a score of 77 k points while the E5-2651 v2 gets 415 k points.
Summarizing, the E5-2651 v2 is 5.4 times faster than the E5645 . To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the E5645 gets a score of 77 k points while the E5-2651 v2 gets 415 k points.
Summarizing, the E5-2651 v2 is 5.4 times faster than the E5645 . To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
206c2
306e4
Core
Westmere-EP
Ivy Bridge-EP
Base frecuency
2.4 GHz
1.8 GHz
Boost frecuency
2.8 GHz
2.2 GHz
Socket
LGA 1366
LGA 2011
Cores/Threads
6 /6
12/24
TDP
80 W
W
Cache L1 (d+i)
64 kB
12x32+12x32 kB
Cache L2
256 kB
12x256 kB
Cache L3
12288 kB
30720 kB
Date
March 2010
October 2013
Mean monothread perf.
15.64k points
17.75k points
Mean multithread perf.
76.96k points
426.18k 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
E5-2651 v2
Test#1 (Integers)
6.47k
6.75k (x1.04)
Test#2 (FP)
4.4k
6.05k (x1.37)
Test#3 (Generic, ZIP)
2.43k
2.61k (x1.07)
Test#1 (Memory)
2.33k
2.26k (x0.97)
TOTAL
15.64k
17.68k (x1.13)
Multithread
E5645
E5-2651 v2
Test#1 (Integers)
34.43k
168.18k (x4.88)
Test#2 (FP)
24.23k
159.6k (x6.59)
Test#3 (Generic, ZIP)
14.48k
77.04k (x5.32)
Test#1 (Memory)
3.81k
10.19k (x2.67)
TOTAL
76.96k
415.01k (x5.39)
Performance/W
E5645
E5-2651 v2
Test#1 (Integers)
430 points/W