Intel Core i5-661: A 32nm CPU with Integrated Graphics

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CPU Performance

Test Results: Benchmarks
Processor
NOD32
WinRAR
iTunes
TMPGEnc
PCMark05
C2Q Q9550
2:31
2:59
3:33
3:14
8760
Core i5-750
2:31
2:38
3:48
3:21
8390
Core i5-661 (Turbo)
2:03
3:30
3:03
3:32
9342
Core i5-661
2:08
3:35
3:10
3:39
9220
C2D E7200
2:47
3:34
4:00
6:10
7057
X4 955 BE
2:27
3:05
4:34
2:52
9004
X2 550 BE
2:34
3:09
4:44
4:54
7217
X3 720 BE
2:47
3:16
5:13
5:08
7738

Our timed benchmark tests were chosen to simulate average use, thus the i5-661 performed very well compared to the competition, winning in an anti-virus scanning race using NOD32, and an audio encoding test using iTunes. Surprisingly, the i5-661 came close to catching its similarly priced quad core cousin, the i5-750, when video encoding using TMPGEnc, test which favors quad cores. Even a task using multiple threads is not a sure-fire win for a quad core over a dual core.

Benchmark Power Consumption

Average System Benchmark Power Consumption (DC)
Processor
NOD32
WinRAR
iTunes
TMPGEnc
C2Q Q9550
66W
77W
70W
92W
Core i5-750
57W
61W
57W
88W
Core i5-750 (Undervolted)
54W
53W
56W
76W
Core i5-661 (Turbo)
52W
53W
55W
70W
Core i5-661
49W
50W
53W
69W
X4 955 BE
105W
105W
113W
138W
X3 720 BE
91W
90W
96W
107W
X2 550 BE
85W
85W
87W
96W
Total System Benchmark Power Consumption (watt-hours, DC)
Test State
NOD32
WinRAR
iTunes
TMPGEnc
Total
Q9550
2.77
3.83
4.14
4.96
15.70
i5-750
2.39
2.68
3.61
4.91
13.59
i5-750 (Undervolted)
2.27
2.33
3.55
4.24
12.38
Core i5-661 (Turbo)
1.78
3.09
2.80
4.12
11.79
Core i5-661
1.74
2.99
2.80
4.20
11.72
X4 955 BE
4.29
5.40
8.60
6.59
24.88
X3 720 BE
4.22
4.90
8.35
9.15
26.62
X2 550 BE
3.64
4.46
6.86
7.84
22.80

When we combine the i5-661's strong performance in our timed benchmarks with the average system power consumption during these tests, we find that it not only finishes tasks quickly, but does so using less total power than any processor we've tested to date. In terms of total watt-hours used for our entire test suite, the i5-661 platform was ahead of the i5-750 by 14% and 5% when the i5-750 was undervolted to its minimum stable voltage.



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