They should be, yes. Those individual amperages should combine, but that does NOT mean that that PSU has 54 total amps on the +12v rails. It still should be enough to power that 3870.
"They should rename the team to the Washington Government Sucks. Put Obama on the helmet. Line the entire walls of the stadium with the actual text of the ACA.
Fix their home team score on the board to the debt clock, they can win every game 17,000,000,000,000 to 24. Losing team gets taxed by the IRS 100%, then droned."