Seagate Barracuda ES.2 FC - Manual (Page 34)

26 Barracuda ES.2 FC Product Manual, Rev. B
6.3 Power dissipation
Typical power dissipation under idle conditions in 4 Gbit operation is 9.16 watts (31.26 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure
2). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5
volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by
3.4123.
Figure 2. DC current and power vs. input/output operations per second at 4 Gbit