My situation was that I didn't have any spare AC adapters on hand with that type of output except for the old psu just lying around. Believe me, I've already looked around. AFAIK for efficiency concerns, just because its a 450 watt psu doesn't mean that it has to put out 450 watts constant drawing maximum 7-10 amps! -right? I hope not and it doesn't make sense too. This psu will only be powering an old 8cm Vantec Tornado, an 90 mm Sunai and a Taifal 60 mm fan -maybe totaling 7 watts judging by the I ratings detailed on these fans. I've already invested enough monies for this corner of this room, I just really don't want stretch it any further just to power up 12v fans. Thank you!