SSD Versus HDD: Power And Performance
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) |
Power Rating (W)
Power Used (mW)
CPU utilization (%)
|Completion Time (mm:ss)|
|Kingston SSDNow 100 V+||0.6||85||14.7||8:06|
|OCZ Agility 2||1.4||186||10.9||7:54|
|OCZ Vertex 3 Pro||1.6||207||15.1||7:41|
|OCZ Vertex 2||1.9||269||13.9||8:28|
|Seagate Momentus 5400.6||2.2||426||10.4||11:40|
|OCZ Vertex 3||2.3||305||15.1||7:50|
|G.Skill SATA II FM-25S2S-64GB||2.6||369||13.5||8:40|