Report - GIGABYTE NPI MB X99-UD4businesscenter.gigabyte.us/image/NPI/GIGABYTE_NPI_MB_GA-X99-UD4.pdf8x DDR4 (64 GB max) 4 Channel 4x PCIE 3.0 x16 320Gb/s(x16,x8,x16,x8) 3x PCIE 2.0 x1 , 1x M.2

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