i have seen the quad hard bridge, if i put my dual tab card in the middle and the two single tab cards on the out side and set the bridge with the no. two connector on number one card it would be the config i need, but i do not knwo how that would work. the cards are bran-new, zotac gtx 570, they totally look like a shorter different model but i says nothing of the single tab on the box my two tab is a zotac gtx 570 amp edition, itwas the one i had first and i cant find any more amps for less than 380 bucks and they are on the web, i bought mine in person at fry's before xmas 2012 installed it now with the other two i opened up, then i realized the tab bull****, i have the amp edition sitting in the box and the two regulars in sli on my baord now. i purchased the two similar cards with two year repair return deal at micro, if i take em back, i probably cant find any two tab cards on the shelf and there goes my tri sli 570 in the can :-(