Model Form Factor Memory Expansion Slot ATI Multi-GPU NVIDIA Multi-GPU Audio Lan SATA3 USB 3.0 USB All Solid Capacitor design Premium Blu-ray Smart Switch Dr. Debug ErP Ready OC Tuner IES Instant Boot Instant Flash OC DNA P55 Deluxe3 ATX 4 x DDR3 2600+(OC) 2 x PCIe 2.0 x16 (x16 | x8/x8) 2 x PCIe 2.0 x1 2 x PCI ATI Quad / CrossFireX NVIDIA Quad / SLI Gigabit LAN 2 2 12 P55 Deluxe ATX 4 x DDR3 2600+(OC) 2 x PCIe 2.0 x16 (x16 | x8/x8) 1 x PCIe 2.0 x16 (x4) 1 x PCIe 2.0 x1 ATI Quad / 3-Way / CrossFireX NVIDIA Quad / 3-Way / SLI Gigabit LAN 2 0 14 P55 Extreme4 ATX 4 x DDR3 2600+(OC) 2 x PCIe 2.0 x16 (x16/x | x8/x8) 3 x PCIe 2.0 x1 2 x PCI ATI Quad / CrossFireX NVIDIA Quad / SLI Gigabit LAN 4 4 12 P55 Extreme ATX 4 x DDR3 2600+(OC) 2 x PCIe 2.0 x16 (x16 | x8/x8) 1 x PCIe 2.0 x16 (x4) 1 x PCIe 2.0 x1 3 x PCI ATI Quad / 3-Way / CrossFireX NVIDIA Quad / 3-Way / SLI Gigabit LAN 0 0 14 P55 Pro/USB3 ATX 4 x DDR3 2600+(OC) 2 x PCIe 2.0 x16 (x16 / x4) 2 x PCIe 2.0 x1 2 x PCI ATI Quad / CrossFireX Quad / SLI Gigabit LAN 0 1 13 P55 Pro ATX 4 x DDR3 2600+(OC) 1 x PCIe 2.0 x16 (x16) 1 x PCIe 2.0 x16 (x4) 2 x PCIe 2.0 x1 2 x PCI ATI Quad / CrossFireX Quad / SLI Gigabit LAN 0 0 14 P55DE Pro ATX 4 x DDR3 2400+(OC) 1 x PCIe 2.0 x16 (x16) 1 x PCIe 2.0 x16 (x4) 2 x PCIe 2.0 x1 2 x PCI ATI Quad / CrossFireX Quad / SLI Gigabit LAN 0 0 14 P55DE3 ATX 4 x DDR3 2400+(OC) 1 x PCIe 2.0 x16 (x16) 1 x PCIe 2.0 x16 (x4) 2 x PCIe 2.0 x1 2 x PCI ATI Quad / CrossFireX Quad / SLI Gigabit LAN 0 0 14 P55M Pro Micro ATX 4 x DDR3 2400+(OC) 1 x PCIe 2.0 x16 (x16) 1 x PCIe 2.0 x16 (x4) 1 x PCIe 2.0 x1 1 x PCI ATI Quad / CrossFireX Quad / SLI Gigabit LAN 0 0 14

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