apg slotI 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 onlyAn AGP 3.3V motherboard connector can only accept AGP cards which have the 3.3V slot. If you try to insert a card without a 3.3V slot into an AGP 3.3V motherboard