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Core i7-920 vs Xeon E5-2651 v2


Description
The i7-920 is based on Nehalem Westmere architecture while the E5-2651 v2 is based on Ivy Bridge.

Using the multithread performance as a reference, the i7-920 gets a score of 47.2 k points while the E5-2651 v2 gets 415 k points.

Summarizing, the E5-2651 v2 is 8.8 times faster than the i7-920 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
106a5
306e4
Core
Bloomfield
Ivy Bridge-EP
Architecture
Nehalem Westmere
Base frecuency
2.667 GHz
1.8 GHz
Boost frecuency
2.993 GHz
2.2 GHz
Socket
LGA 1366
LGA 2011
Cores/Threads
4/8
12/24
TDP
130 W
W
Cache L1 (d+i)
32+32 kB
12x32+12x32 kB
Cache L2
256 kB
12x256 kB
Cache L3
8192 kB
30720 kB
Date
November 2008
October 2013
Mean monothread perf.
16.33k points
17.75k points
Mean multithread perf.
47.2k 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
i7-920
E5-2651 v2
Test#1 (Integers)
6.12k
6.75k (x1.1)
Test#2 (FP)
4.76k
6.05k (x1.27)
Test#3 (Generic, ZIP)
2.78k
2.61k (x0.94)
Test#1 (Memory)
2.67k
2.26k (x0.85)
TOTAL
16.33k
17.68k (x1.08)

Multithread

i7-920

E5-2651 v2
Test#1 (Integers)
19.26k
168.18k (x8.73)
Test#2 (FP)
14.96k
159.6k (x10.67)
Test#3 (Generic, ZIP)
8.05k
77.04k (x9.57)
Test#1 (Memory)
4.92k
10.19k (x2.07)
TOTAL
47.2k
415.01k (x8.79)

Performance/W
i7-920
E5-2651 v2
Test#1 (Integers)
148 points/W