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Core i7-860 vs Xeon E5645


Description
The i7-860 is based on Nehalem architecture while the E5645 is based on Westmere.

Using the multithread performance as a reference, the i7-860 gets a score of 75.4 k points while the E5645 gets 77 k points.

Summarizing, the E5645 is 1 times faster than the i7-860 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
106e5
206c2
Core
Lynnfield
Westmere-EP
Architecture
Base frecuency
2.8 GHz
2.4 GHz
Boost frecuency
3.467 GHz
2.8 GHz
Socket
LGA 1156
LGA 1366
Cores/Threads
4/8
6 /6
TDP
95 W
80 W
Cache L1 (d+i)
4x32+4x32 kB
64 kB
Cache L2
4x256 kB
256 kB
Cache L3
8192 kB
12288 kB
Date
September 2009
March 2010
Mean monothread perf.
19.19k points
15.64k points
Mean multithread perf.
75.43k 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
i7-860
E5645
Test#1 (Integers)
2.15k
1.78k (x0.83)
Test#2 (FP)
4.87k
3.91k (x0.8)
Test#3 (Generic, ZIP)
2.82k
2.52k (x0.89)
Test#1 (Memory)
3.13k
2.42k (x0.77)
TOTAL
12.97k
10.64k (x0.82)

Multithread

i7-860

E5645
Test#1 (Integers)
8.24k
9.67k (x1.17)
Test#2 (FP)
21.63k
22.92k (x1.06)
Test#3 (Generic, ZIP)
14.65k
14.31k (x0.98)
Test#1 (Memory)
5.02k
3.81k (x0.76)
TOTAL
49.54k
50.7k (x1.02)

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
i7-860
E5645
Test#1 (Integers)
7.87k
6.47k (x0.82)
Test#2 (FP)
5.25k
4.4k (x0.84)
Test#3 (Generic, ZIP)
2.94k
2.43k (x0.83)
Test#1 (Memory)
3.13k
2.33k (x0.75)
TOTAL
19.19k
15.64k (x0.81)

Multithread

i7-860

E5645
Test#1 (Integers)
31.5k
34.43k (x1.09)
Test#2 (FP)
23.47k
24.23k (x1.03)
Test#3 (Generic, ZIP)
15.47k
14.48k (x0.94)
Test#1 (Memory)
4.98k
3.81k (x0.77)
TOTAL
75.43k
76.96k (x1.02)

Performance/W
i7-860
E5645
Test#1 (Integers)
332 points/W
430 points/W
Test#2 (FP)
247 points/W
303 points/W
Test#3 (Generic, ZIP)
163 points/W
181 points/W
Test#1 (Memory)
52 points/W
48 points/W
TOTAL
794 points/W
962 points/W

Performance/GHz
i7-860
E5645
Test#1 (Integers)
2271 points/GHz
2311 points/GHz
Test#2 (FP)
1514 points/GHz
1573 points/GHz
Test#3 (Generic, ZIP)
847 points/GHz
867 points/GHz
Test#1 (Memory)
902 points/GHz
833 points/GHz
TOTAL
5534 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