ASRock B450M/AC AM4 Micro ATX AMD Motherboard Overview : AMD AM4 Socket Supports DDR4 3200+ (OC) 1 PCIe 3.0 x16, 1 PCIe 2.0 x16 AMD Quad CrossFireX Graphics Output: HDMI 7.1 CH HD Audio (Realtek ALC892 Audio Codec), ELNA Audio Caps 4 SATA3, 1 Ultra M.2 (PCIe Gen3 x4)* 6 x USB 3.1 Gen1 (2 Front, 4 Rear) Realtek Gigabit LAN ASRock Polychrome SYNC RULE YOUR OWN LIGHTING WAY – POLYCHROME RGB This motherboard features onboard RGB headers and an addressable RGB header that allow motherboard to be connected to compatible LED devices such as strip, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects. Ultra M.2 32 Gb/s (PCIe Gen3 x4) The PCIe Gen3 x4 Ultra M.2 interface pushes data transfer speeds up to 32Gb/s, and is compatible with ASRock’s U.2 Kit for installing some of the world’s fastest U.2 PCIe Gen3 x4 SSDs. Dual Band 802.11ac WiFi No one has time for weak WiFi signals and sluggish internet! That’s why this motherboard comes with a 802.11ac WiFi (2.4G / 5G WiFi) module which supports wireless networks and Bluetooth v4.2. 4 x USB3.2 Gen1 Delivering data transfer rates up to 10X faster than USB 2.0 with optimized power efficiency. USB 3.2 Gen1 technology advances the data transfer rate up to 5Gb/s. ASRock provides 4 x USB 3.2 Gen1 ports onboard allows you to have a stunning data transfer experience. Specification : Model Brand ASRock ModelB450M/AC Supported CPU CPU Socket Type AM4 CPU Type Ryzen / Athlon Series Chipsets Chipset AMD Promontory B450 Memory Number of Memory Slots 4×288pin Memory Standard AMD Ryzen series CPUs (Matisse) support DDR4 3200/ 2933/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory* AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4 3200+(OC)/ 2933(OC)/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory* AMD Ryzen series CPUs (Picasso) support DDR4 2933/ 2667/ 2400/ 2133 non-ECC, un-buffered memory* AMD Ryzen series CPUs (Summit Ridge) support DDR4 3200+(OC)/ 2933(OC)/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory* AMD Ryzen series CPUs (Raven Ridge) support DDR4 3200+(OC)/ 2933/ 2667/ 2400/ 2133 non-ECC, un-buffered memory* * For Ryzen Series CPUs (Picasso and Raven Ridge), ECC is only supported with PRO CPUs. Maximum Memory Supported 64GB ** Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows 32-bit OS. For Windows 64-bit OS with 64-bit CPU, there is no such limitation. Channel Supported Dual Channel Expansion Slots PCI Express 3.0 x16 AMD Ryzen series CPUs (Matisse, Summit Ridge and Pinnacle Ridge) 1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode)* AMD Ryzen series CPUs (Picasso, Raven Ridge) 1 x PCI Express 3.0 x16 Slot (PCIE1: x8 mode)* AMD Athlon series CPUs 1 x PCI Express 3.0 x16 Slot (PCIE1: x4 mode)* * Supports NVMe SSD as boot disks PCI Express 2.0 x16 AMD Ryzen series CPUs (Summit Ridge and Pinnacle Ridge) 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode) AMD Ryzen series CPUs (Raven Ridge) 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode) AMD Athlon series CPUs 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode) Other Slots 1 x Vertical M.2 Socket (Key E) with the bundled WiFi-802.11ac module (on the rear I/O) Storage Devices SATA 6Gb/s 4 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug M.2 1 x Ultra M.2 Socket (M2_1), supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32Gb/s) (with Matisse, Picasso, Summit Ridge, Raven Ridge