Seagate ST3300457SS Cheetah 15K.5 FC Product Manual - Page 37
Power dissipation
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6.3 Power dissipation ST3300655FC Typical power dissipation under idle conditions in 4 Gbit operation is 13.3 watts (45.4 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 7). 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. Amperes 1.400 1.200 1.000 0.800 0.600 0.400 0.200 0.000 0.0 ST3300655FC CURRENT/POWER vs THROUGHPUT (FC - 4GB) Random 8 Block Reads 20.00 18.00 16.00 14.00 12.00 10.00 8.00 6.00 4.00 2.00 0.00 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0 I/Os per Second Power (watts) 5Volt A 12 Vo lt A Watts Figure 7. ST3300655FC DC current and power vs. input/output operations per second at 4 Gbit Cheetah 15K.5 FC Product Manual, Rev. F 29