Benchmark Results: Power Draw And Efficiency
The smallest difference in power draw between a hard disk and SSD is seen during our writing stress test. But even then, three or four SSDs could be powered by the amount of energy that a single 7200 RPM drive draws.
Efficiency: Performance per Watt
In database applications, the Samsung 470 achieves an I/O performance per watt that is 476 times better than the Seagate Barracuda XT.
During write operations, the SSD still offers a performance per watt index that is several times better than the hard disk.
At this point, we want to briefly discuss a more obscure measurement "capacity per watt," where SSDs would take second place behind large hard drives. You'd need several SSDs to match the capacity of a single 3 TB Seagate Barracuda XT. Thus, it goes without saying that people who want to store large amounts of data will continue to buy hard disks.