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If your computer mysteriously restarts itself with no prompts, this is a major sign that your power supply is not providing enough power to your computer. You cannot harm your hardware by not offering enough power, so don't be worried about that. Things that spin eat up the most power, such as fans, CD-roms and hard drives. Addings lots of PCI cards don't take much power. I have 2 hard drives, 2 DVD drives, an intake fan and a hard drive cooler on my 350W power supply and it runs fine.

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โˆ™ 2011-09-13 18:25:18
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Q: When adding hardware to a computer how do you know at some point if you are in danger of not having the proper power supply for the add ons?
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