Socket 2066, Chipset Intel C422, RAM 8x DDR4 DIMM, quad PC4-21300L / DDR4-2666, max. N / A (UDIMM), 256GB (RDIMM), 512GB (LRDIMM), Extension slots 4x PCIe 3.0 x16 (3x x16, 1x x8), 1x PCIe 3.0 x4, 1x M.2 / M-Key (PCIe 3.0 x4 / SATA, 2280/2260/2242), 1x M.2 / M-Key (PCIe 3.0 x4, 22110/2280/2260/2242), 1x U.2 / SFF-8643 (PCIe 3.0 x4), External connections 1x USB-A 3.1 (ASM3142), 1x USB-C 3.1 (ASM3142), 4x USB-A 3.0, 4x USB-A 2.0, 2x Gb LAN (Intel I210-AT), 5x jack, 1x Toslink, 1x USB BIOS Flashback (internal), Internal connections 1x USB-C 3.1 (20-pin Key-A header, ASM3142), 2x USB 3.0, 2x USB 2.0, 6x SATA 6Gb / s (C422), 1x Thunderbolt header 5-pin, 1x serial, 1x TPM Header, 1x VROC header, Header cooling 2x CPU fan 4-pin, 2x fan 4-pin, 1x AIO pump 4-pin, 1x pump 4-pin, 1x fan 5-pin, Header lighting 1x RGB header 4-pin (5050), 1x RGB header 3-pin (WS2812B), Buttons / Switches Power Button (internal), Reset Button (internal), MemOK Button (internal), Clear CMOS Button (internal), Audio 7.1 (Realtek ALC1220), DTS Connect, DTS Headphone: X, RAID level 0/1/5/10 (C422), Multi-GPU NVIDIA 3-Way SLI (x16 / x16, x16 / x16 / x8), AMD 3-Way CrossFireX (x16 / x16, x16 / x16 / x8), Power connections 1x 24-pin ATX, 2x 8-pin EPS12V, 1x 6-pin PCIe, Special features Audio + solid capacitors, Diagnostic LED, 2x M.2 passive cooler, ATX