PSU Requirements for HD3850/70

[Dangman]

Does anybody know exactly how much Amps the HD 3850 and HD 3870 require on the +12V rails? I know ATI lists provide a minimum wattage setting but that's just to cover their bases considering all the bad quality power supplies out there with 30A on the +5V Rail and 20A on the +12V.

I've managed to track down the minimum Amps Nvidia cards need but just not ATI cards.

Thank You.

 

[MrLonghair]

Or if someone knew how much the 2900XT wants. Feels like we can take that and cut it by a third.

(edit) Just read the Guru3d review which says

Also recommended is 28 AMP's on the 12 volts rails for stable power distribution (on a single card configuration)

Of course that's to power a complete system together with any 3800 series card so I think we can plug and play rather than plug and pray.