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150W enough for Athlon XP 2400?

I was looking for a micro atx type case to make a DVR computer out of with some of the leftover junk I have and found one with a 150W power supply. I'm trying to figure out if the power supply is enough to run an AMD Athlon XP 2400+ with one 60GB hard disk and a basic DVD-ROM. There will be a few fans as well (one cpu fan, 2 in case).
 
I ran an AthlonXP 1800+ with one hard drive (160GB) and an optical for a few months off of a 180W PSU (also a mATX). With the mATX form factor, you have less items to run... I was also only running one extra case fan (off the mobo header) so depending on how much hardware you have will determine what you can run it off of that PSU. Are you looking to have a TV tuner and video card with tv-out on it? That will determine, more, if you'll be able to run with the small PSU. Of course, you'd be safer with a PSU closer, or over 200W even for the mATX size...

Good rule of thumb is to not go below 300W for any system. Unless you're running very very little inside the system.
 
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