Intel Q9550S: A Greener Quad Core?

CPUs|Motherboards
Viewing page 4 of 6 pages. Previous 1 2 3 4 5 6 Next

TEST RESULTS

Both our Intel and AMD systems consist of a moderately priced motherboard with DDR3 memory support, 2x2GB of DDR3 memory in dual channel set to the 1333 MHz with timings of 9-9-9-24. A GeForce 9400GT graphics card, WD VelociRaptor and OEM 400W 80 Plus Seasonic power supply round out the test configuration.

Test Results: General System Power Consumption
Test State
X4 955 BE
QX9650
Q9550
Q9550S
Idle
73W
68W
64W
62W
VC-1
Playback
99W
86W
75W
73W
CPU Load
(2 cores)
157W
122W
120W
105W
CPU Load
(4 cores)
201W
142W
140W
125W

The Q9550S used slightly less power than the Q9550 during general power consumption testing. System power was 2W less when idle and during VC-1 video playback. Placing a load on the CPU increased its lead by 15W. It is undoubtedly more energy efficient, but the difference is hardly what one would expect considering the 65W rating. Our Core 2 Extreme QX9650 used only slightly more power than the Q9550, which suggests its 130W TDP is quite conservative.

Benchmark Comparison
Test
X4 955 BE
QX9650
Q9550
Q9550S
NOD32
2:27
2:23
2:31
2:31
WinRAR
3:05
2:51
2:59
2:57
iTunes
4:34
3:20
3:33
3:33
TMPGEnc
2:52
3:07
3:14
3:15
PCMark2005
9004
9061
8760
8766

As expected, the Q9550 and Q9550S performed almost identically in our benchmarks, with the subtle differences well within margins of error. Both chips are only slightly behind AMD's fastest, the Phenom II X4 955 Black Edition.

Average Benchmark Power Consumption
Test
X4 955 BE
QX9650
Q9550
Q9550S
NOD32
128W
88W
84W
78W
WinRAR
128W
98W
96W
87W
iTunes
137W
92W
89W
81W
TMPGEnc
167W
118W
113W
102W
Est. Total Benchmark Power Consumption (Watt-hours)
NOD32
5.23
3.50
3.52
3.27
WinRAR
6.58
4.66
4.77
4.28
iTunes
10.43
5.11
5.27
4.79
TMPGEnc
7.98
6.13
6.09
5.53

The Q9550S also used less power during the time it took to run each timed benchmark, between 6W and 11W less depending on the test. The total difference for all the benchmarks combined was 9%. If we operated the Q9550 system continuously for a year running just TMPGEnc, it would draw 78.84 kWh more than the same system with a Q9550S. According to the EIA the average cost of electricity in the United States in March of 2009 was 11.38 cents per kilowatt-hour. Average savings for one year: $8.97. Average time to recoup a $115 price difference: 12.8 years.



Previous 1 2 3 4 5 6 Next

CPUs|Motherboards - Article Index
Help support this site, buy the Intel Core 2 Q9550 Quad Core Processor from one of our affiliate retailers!