Asus L1N64-SLI WS - Manual (Page 41)

ASUS L1N64-SLI WS 2-
• Connect a rear chassis fan to the chassis (CHA_FAN1 or CHA_FAN2)
connector when using two graphics cards for better thermal environment.
See page 2-27 for details.
• In single card mode, you may use either the blue or black slot for PCI
Express x16 graphics cards.
• We recommend that you provide sufficient power when running NVIDIA ®
SLI™ mode. See page 2-25 for details.