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SSD Versus HDD: Power And Performance

Best SSDs For The Money: April 2011
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Do you transcode video, regularly copy large amounts of data, or watch locally-stored movies with high bit rates? If you consistently perform disk intensive tasks, SSDs are a great way to boost performance. But even if you only browse the Web, SSDs introduce tangible benefits in performance and power. Take a look at the CPU utilization and power consumption results from one of our recent reviews. 

A disk-based drive will always consume more power absolutely. At the system level, an SSD increases power consumption because CPU and memory utilization rises in response to improved I/O activity (they're not sitting there, waiting on a hard drive to send data). But remember that an SSD-based configuration will always finish those operations faster. At the end of the day, an SSD lowers power consumption. This is why performance and power go hand-in-hand.

PCMark Vantage (x64)
HDD Suite
Average
Power Rating (W)
Actual
Power Used (mW)
Average
CPU utilization (%)
Completion Time (mm:ss)
Kingston SSDNow 100 V+
0.68514.78:06
OCZ Agility 2
1.418610.97:54
Intel X25-M
1.424210.810:17
OCZ Vertex 3 Pro
1.620715.17:41
OCZ Vertex 2
1.926913.98:28
Seagate Momentus 5400.6
2.242610.411:40
OCZ Vertex 3
2.3
305
15.1
7:50
G.Skill SATA II FM-25S2S-64GB
2.636913.58:40
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