Gigabyte's GA-P55-UD5 socket-1156 motherboard is an enthusiast grade Intel P55 Express platform with a ton of extra features packed into it. Along with the obvious support of Intel Core i5 and Core i7 800-series socket 1156 processors, the GA-P55-UD5 board features three physical PCI Express x16 2.0 slots that support both ATI Crossfire and NVIDIA SLI modes.