The motherboard has 6-phase VRM for the CPU, eight DDR4 memory slots with DDR4-3333 support with overclocking, four PCIe 3.0 x16 slots (x16/NC/x16/NC or x16/NC/x8/x8 or x8/x8/x8/x8 on i7-5930K and i7-5960X; x16/NC/x4 or x8/x8/x4 on i7-5820K). It draws power from 24-pin ATX and 8-pin EPS power connectors, with optional 4-pin Molex input to stabilize multi-video card systems.
Storage connectivity on the X99-SLI includes an M.2 slot (PCIe 2.0 x2 / SATA 6 Gb/s), a SATA-Express 10 Gb/s port, and a total of ten SATA 6 Gb/s ports, from which six can be used to build RAID arrays, while the other four only run in AHCI mode (a chipset limitation). Modern connectivity includes eight USB 3.0 ports (six on the rear panel, two by headers), a single gigabit Ethernet connection driven by an Intel-made controller, and GIGABYTE's AMP-Up audio solution that combines a 115 dBA SNR Realtek ALC1150 codec with audio-grade capacitors, a headphones amp, audio-grade electrolytic capacitors, and ground-layer isolation.