NO, NO, NO, NO, NO, I did not have sexual relations with that Power Supply! HaHa! Anyway, 250W power supplies will work fine with the TBird 1.2Ghz CPU, it just has to be the right brand. If you look on AMD's web site for the recommended power supply, you will see many non-400W units listed. All this shows it that you get what you pay for, as better engineered, better quality units can do great with total less power output! As for the 400W power supply being AMD's "new official line", all they mean by that is that if you purchase a unit rated at 400W total, you can't go wrong, otherwise you should be checking that recommend power supply list. I found my new 300W power supply in my new Antec Performance Series case not up to par, but my existing Sparkle FPS300GT 300W power supply as very capable. With the Antec 300W power supply I got a pause in the booting of the system, it just sat for about 4 seconds before listing the boot options of Windows, or Win2k, and speeds over 1200mhz were unstable, but with the Sparkle 300W power supply, I can run at 1333mhz just fine and the pause I got when booting is gone! You get what you pay for, period!