How do I know if my PSU has enough amps for a 8800GTS video card upgrade?

I have an Antec NeoPower NeoHE 550 ATX12V 550W Power Supply with the following output:



+3.3V@24A, +5V@20A, +12V1@18A, +12V2@18A, +12V3@18A, -12V@0.8A, +5VSB@2.5A



I want to upgrade to a GeForce 8800GTS 640MB 320-bit GDDR3 graphics card. The card has the following power requirements:



Minimum of a 400 Watt power supply.

(Minimum recommended power supply with +12 Volt current rating of 26 Amps.)



I have always had problems understanding power supply specifics. Can somebody explain if my power supply has enough power to handle this card? And how?



Thanks

Zach|||Yes your power supply should handle this card. Most people do not understand that a atx power supply has to produce 3 types of voltage. 3.3/5/12v. The specs are asking for a power supply that can handle a total of 26 amps on its 12 volt side. If you add up you have 4 12v rails that are capable of providing a total of 54.8 amps. This will not be a problem.





Hope this helps.|||I'm almost as lost as you are when it comes to all this goobelygook,Zach.Using my low tech logic,the card calls for 26 amps. The highest rated 12V leg I see is rated at 18 Amps.Using that, I would say no.I am afraid it would run glichy and maybe start freezing up at intensive points in the game.Then too,it would probably depend on what games you play.That is,of course,just my rather uninformed $0.02 worth.Anybody else?Help out a couple of noobs?