Power management burn out on MDD running 4 Hitachi UltraStar 750gb in Raid

I have a MDD Dual Processor 1.0 that I would like to set up in Raid 10 using OSX 10.4.11. There will be a total of 4 Hitachi UltraStar internal drives that consume 8.1watts of power each. I also run the 17" LCD cinema display that runs off system power and has two super drives in the machine. Do I risk power management burnout issues in this array. I also may connect USB powered drives and things from time to time. This machine was bought 2nd hand and i do not know if it has the 360watt power supply or the 400 watt power supply. I have also read in another forum the benchmark on the 360 watt actually specs out higher power than apple lists. If anyone can help me out I have drives on the way and would like to start my project.

So after speaking with apple tech support they did advise that I call Hitachi in regards to the power consumption of the drives. According to the calculations they came up with I should have plenty of power to run this setup. Kudos to Hitachi they were extremely helpful with this matter NO WONDER Apple tends to frequently use their drives. In any case thanks again for helping out. Side Note I did a check atm on operating temp in the machine and at the current state with three ide drives in not running raid im 10 degrees celcius below what they consider to be normal operating temperature. Keep ya posted on this.
Thanks Again

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    http://www.staff.uni-marburg.de/~schmitzr/donate.html
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    T430u, x301, x200T, x61T, x61, x32, x41T, x40, U160, ThinkPad Tablet 1838-22R, Z500 touch, Yoga Tab 2 Windows 8.1, Yoga Tablet 3 Pro
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