Model Form Factor Memory Expansion Slot ATI Multi-GPU NVIDIA Multi-GPU Graphics Audio Lan SATA3 USB 3.0 USB All Solid Capacitor design Turbo 50 Premium Blu-ray Smart Switch Dr. Debug ErP Ready OC Tuner IES Instant Boot Instant Flash OC DNA H55 Extreme3 ATX 4 x DDR3 2600+(OC) 1 x PCIe 2.0 x16 3 x PCIe 2.0 x1 3 x PCI by CPU Gigabit LAN 2 1 11 H55 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 n/a Gigabit LAN 0 0 12 H55M Pro Micro ATX 4 x DDR3 2600+(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 by CPU Gigabit LAN 0 0 12 H55M/USB3 Micro ATX 2 x DDR3 2600+(OC) 1 x PCIe 2.0 x16 2 x PCIe 2.0 x1 1 x PCI by CPU Gigabit LAN 0 1 11 H55iCafe ATX 4 x DDR3 2600+(OC) 1 x PCIe 2.0 x16 2 x PCIe 2.0 x1 2 x PCI by CPU Gigabit LAN 0 0 10 H55M-GE Micro ATX 4 x DDR3 2600+(OC) 1 x PCIe 2.0 x16 1 x PCIe 2.0 x1 2 x PCI by CPU Gigabit LAN 0 0 12 H55M Micro ATX 2 x DDR3 2600+(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 by CPU Gigabit LAN 0 0 12 H55M-LE Micro ATX 2 x DDR3 2600+(OC) 1 x PCIe 2.0 x16 (x16) 1 x PCIe 2.0 x1 2 x PCI by CPU Gigabit LAN 0 0 10 H55DE3 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 by CPU Gigabit LAN 0 0 12

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