sterex

Hi, i recently aquired a bfg 7800 gtx oc. i need a new psu for my computer and i cant figure out witch one. i ran a pc voltage calculation and with the new gc it says i need about 500 w. for my gc it says i need a 12v rating of 26a or higher. while looking on http://www.xoxide.com/ultra-x-connect2-uvblue.html <<<---- that page i saw # +12V1: 17A # +12V2: 18A. i was wondering if that would add up to run my card so it would have a rating of 35a or its 2 different ratings that were completely different.