No. It only uses how much it needs. But the higher the max power, the more PC components you are able to run simotaniously. 750watts for a regular PC is a big waste of money. Most normal PC's only run on 175-300watts. 750watts would be in the server computer range, where many hard drives and other components are used + the extra power for the larger CPU's, RAM and cooling units.
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8:29 pm on April 8, 2007 | Joined June 2006 | 446 Days Active Join to learn more about Zw33K3RB0YNebraska, United States | StraightMale | 9587 Posts | 19410 Points