![](http://pdfasset.owneriq.net/7/9b/79ba01f1-5e42-460b-8730-e04f582c236f/79ba01f1-5e42-460b-8730-e04f582c236f-bga7.png)
ASUS P5N72-T Premium 6-3
the second into
the PCIEX16_3 slot (black), and the third into the PCIEX16_2 slot (blue).
Make sure that the cards are properly seated on the slots.
3-way SLI bridge connector