Asus MOTHERBOARD P5N64 WS - Manual (Page 179)

ASUS P5N64 WS Professional 6-5
6.2.2 Installing two SLI-ready graphics cards
1. Insert one graphics card into the PCIEX16_1 slot (blue) and the other into the
PCIEX16_2 slot (blue). Make sure that the cards are properly seated on the
slots.
2. Align and insert the SLI connector to the goldfingers on each graphics card.
Make sure that the connector is firmly in place.
3. Connect auxiliary power source from the power supply to he two graphics
cards separately.
4. Connect a VGA or a DVI-I cable to the graphics card/s.
We recommend that you install an additional chassis fan for better thermal
environment.