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itx power supply questions - Page 2

post #11 of 12
While the drive you will be using is a low power drive in the first place, the reason PSU calculators would give an estimate of 50W for a hard drive is because some drives can reach that level of consumption on spin up (aka, when the computer first turns on or when waking up from idle). After spin up, power consumption is fairly low. If someone has like 7 hard drives in the system, they would need a PSU capable of spinning all 7 at once, or install a hard drive controller that can do a rolling/staggering spin up.

For example, a drive might consume 10W on load, but require 30W to spin up. It is during that slight moment where you need 210W, but on standard usage, only requires 70W.
Edited by minnus - 4/24/12 at 8:47am
post #12 of 12
Thread Starter 
wow 3.8 watts I guess I really did over compensate with allowing for 50 watts:D:D


thanks!
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