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PSU Power over head

What % over head should we consider when I check to see that i have not planned to use to many watts for my PSU. atm i need to about 460W. Also how many watts does as something powered by the USB port use or does it depend on what u are using on it.
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Cained
Asked:
Cained
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1 Solution
 
CainedAuthor Commented:
Dont comment on my bad english.
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rrhunt28Commented:
Power is directly related to all the parts you put into the system and run off the system.  I think you should probably post what you are running, that might make things easyer.  And if you want to go much higher than 460 you might want to look into a dual power supply system.  
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rrhunt28Commented:
One other thing, it is very important especailly on expensive equipment to run a UPS so that you have a clean constant source of power.  That way whatever power supply you use, it will be able to deliver the power needed.
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CainedAuthor Commented:
Pentium 4/3.06ghz Htt 512kb Fsb533 S478
PC2700 512MB 333MHz DDR DIMM x 4
P4G8X/Deluxe/gd SKT478 Ie7205 - ATX Sound LAN FireWire FSB533 SATA Motherboard
Epson EPL-5900L 2Mb 12ppm 1200dpi A4
Vapochill Mk II Premium Edition BLACK
Sapphire Radeon 9700 Atlantis 128MB DDR 8x AGP DVI TV-OUT
Sound Blaster Audigy 2 Platinum
Western Digital Caviar SE 120Gb 7200rpm 8mb Cache EIDE Hard Drive - OEM x2
Samsung SM753S 17ins FST 0.23Dpi 70KHz MPR2 with 3year onsite Warranty
I-O Data LCD-A15V/E 15ins TFT 0.29dpi 1024x768 with 3year OnSite Warranty
Eluminx Black case with aquamarine keyboard panel
IntelliMouse Optical v1.1 4Button PS2 USB
LG 48x24x48 IDE Internal CD-RW Drive - OEM Inc. Nero Burning Rom
Artec 16x48 DVD Drive - Retail Box
Alps Floppy Disk Drive 1.44MB 3.5 inch internal - OEM

Thats what im planning to use and the monitors wont plug into the PSU.
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rrhunt28Commented:
Well... I would imagin 460 would be fine for that.  And you do not want your monitors plugged into the cpu.  You want your monitors and your power suppy plugged into a UPS, then you can plug your printers into a surge protector.  I think you have enough power for what you are doing.  The big thing is do you ever notice a drop in speed, or does the computer ever reboot randomly.  IF yes, maybe you need more power, if no, your fine.
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CainedAuthor Commented:
Cheers and btw do u know out of interest how many watts is used when the USB is powering something or does it depend on what it is powering??.
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rrhunt28Commented:
Well, I am not sure of the exact voltage, but it is not very much.  I do know that if you try to run too many USB devices off one port with out some sort of Hub that has power, they will be underpowered and not work.  It is probably around 12 volts.
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