剛剛瀏覽AnandTech A64 3400+ part2他們才提到Power Requirements(供電需求)：
Our standard test setup uses a 350-watt PowMax power supply because it is typical of a good quality power supply from a typical components or "white-box" dealer. The 3400+ would not run with complete stability on this 350-watt PS. We ended up moving to a 430-watt Antec True Power, which was one of the top performers in our Power Supply roundup, to get stable performance with the 3400+. The 3400+, in our experience, requires a good PS rated at least an honest 400 watts.

大概翻一下：
我們的測試使用PowMax 350W因為它是內附PSU之外品質較好的電源供應器，A64 3400+使用這顆350W有些不穩，我們最後換了一顆430W Antech True Power--它是我們上次PSU測試的最佳供應器之一--才得到穩定的性能，以我們的經驗看，3400+需要一顆實際輸出400W且品質佳的PSU。

由此可知，若是將來都不升級，3000+用350W就夠了，但是若要繼續升級最好買一顆400W且用料好的PSU。