guys, new to "modding" my PC. I just purchased a nice (refurb) unit from Dell but was cautioned that in running extra memory, RAID1 a high end video card with self cooling and other that I may need a higher output power supply. Where can I learn about what draw I have on my system, what my current (dell i assume) power supply puts out and what I would need to upgrade to? Can I simply upgrade to a higher wattage power supply even if it may be overkill? Will it self regulate and provide enough power or do I need to match the power supply to the system? I have a Micro Center down the road - will have a chat with them but sometimes they know sometimes you get an employee who doesn't know.