Hi , my friend have a problem with 4 x 780 GTX asusDU2-OC
in 3 way with the flexible bridge there no problem but in 4 way needed rigid bridge and the cover of the vga and too big
http://videocardz.com/images/2013/06/GTX780-DC2OC-3GD5_back.jpg
VIA PT880-8237
http://valid.canardpc.com/ylln6u
the card is this http://reviews.cnet.com/motherboards/dfi-pt880-alf-motherboard/4505-3049_7-31241554.html