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For Reference, SSD Versus HDD: Power And Performance

Best SSDs For The Money: October 2011
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Do you transcode video, copy large amounts of data, or run your own Web server? If you consistently perform I/O-intensive tasks, SSDs are a great way to improve speed. But even if you only browse the Internet, SSDs still offer 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 increased 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. You see that reflected in the charts above. 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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