P5K3 Deluxe/WIFI-AP P5K Deluxe /WIFI-AP P5K-E/WIFI-AP P5KC  Chipset Intel P35 / ICH9R Intel P35 / ICH9R Intel P35 / ICH9R Intel P35 / ICH9  Memory DDR3-1333/1066/800 MHz DDR2-1066/800/667 MHz DDR2-1066/800/667 MHz DDR3 / DDR2  System Bus 1333 / 1066 / 800 MHz 1333 / 1066 / 800 MHz 1333 / 1066 / 800 MHz 1333 / 1066 / 800 MHz  Graphics Slot 2 x PCI-E x16, CrossFire at x16, x4 2 x PCI-E x16, CrossFire at x16, x4 2 x PCI-E x16, CrossFire at x16, x4 2 x PCI-E x16, CrossFire at x16, x4

P5K P5K-V P5K-VM P5K SE  Chipset Intel P35 / ICH9 Intel G33 / ICH9 Intel G33 / ICH9 Intel P35 / ICH9  Memory DDR2-1066/800/667 MHz DDR2-1066/800/667 MHz DDR2-1066/800/667 MHz DDR2-1066/800/667 MHz  System Bus 1333 / 1066 / 800 MHz 1333 / 1066 / 800 MHz 1333 / 1066 / 800 MHz 1333 / 1066 / 800 MHz  Graphics Slot 2 x PCI-E x16, CrossFire at x16, x4 2 x PCI-E x16, CrossFire at x16, x4 Int. Intel GPU 1 x PCI-E x16 Int. Intel GPU 1 x PCI-E x16

P5K3 Deluxe WIFI-AP P5K Deluxe WIFI-AP P5K-E WIFI-AP P5KC P5K P5K-V P5K-VM P5K SE Native DDR3 1333 Support v               Native DDR2 1066 Support   v v   v v v v ASUS Super Memspeed Technology v v v   v v v v New Generation 8 Phase Power Design v v v           Save 50% CPU Power - AI Gear 2 v v v v v v v v Fanless Design - Heat Pipe v v v v v v     Up to 20°C(36°F) Cooler - Stack Cool 2 v v v v         AI Nap v v v v v v v v Uses 100% All High-quality Conductive Polymer Capacitors! v v v v v v v v ASUS WiFi-AP Solo v v v           AI Slot Detector v v v v v v     Q-Connector v v v v v v v v