apg slotThe AGP Pro slot uses 5 volts and a regular AGP slot draws only 1.5 or 3.3 volts, misalnment will cause a regular AGP card to draw 5 volts and fry the video card. It's imperative that aI started a thread about another odd type of motherboards, Socket 423 and 478 motherboards with the universal AGP slot which are not as common as their 1.5v keyed only