ASUS Prime X870-P CSM AM5 DDR5 AMD Motherboard

The ASUS Prime X870-P CSM is an ATX form factor motherboard built on the AMD X870 chipset, designed for AMD Socket AM5 processors including AMD Ryzen 9000, 8000, and 7000 series desktop CPUs. It measures 12 inches by 9.6 inches (30.5 cm x 24.4 cm) and is engineered for DIY builders and professionals who demand a stable, feature-rich platform with forward-looking connectivity. On the memory side, the board provides four DDR5 DIMM slots supporting up to 192GB of unbuffered ECC and non-ECC memory, with speeds reaching 8000+ MT/s (OC) when paired with Ryzen 9000, 8000, or 7000 series processors. It supports AMD EXPO and ASUS AEMP memory profiles for simplified overclocking. Storage options are generous: four M.2 Key-M slots are available, with the primary M.2_1 slot operating at PCIe 5.0 x4 when used with Ryzen 9000 or 7000 series CPUs, and PCIe 4.0 x4 with Ryzen 8000 series. The remaining three M.2 slots run via the AMD X870 chipset at PCIe 4.0 x4 or PCIe 3.0 x2 depending on slot. Two SATA 6Gb/s ports are also present, with bandwidth sharing caveats documented in the specification table. AMD RAIDXpert2 supports PCIe RAID 0/1/5/10 and SATA RAID 0/1. Connectivity is a highlight: the rear I/O delivers two USB4 (40Gbps) Type-C ports capable of 4K@60Hz display output, one USB 10Gbps Type-A port, three USB 5Gbps Type-A ports, four USB 2.0 Type-A ports, one HDMI 2.1 port (4K@60Hz), one Realtek 2.5Gb Ethernet port with ASUS LANGuard, three audio jacks, and a BIOS FlashBack button for easy firmware updates without a CPU or memory installed. The audio subsystem uses a Realtek High Definition Audio CODEC with 7.1 surround sound support (chassis HD audio module required), 24-bit/192kHz playback, audio shielding, premium capacitors, and dedicated PCB layers. Three Addressable Gen 2 headers support Aura Sync RGB lighting. ASUS 5X Protection III features include DIGI+ VRM with DrMOS, LANGuard, overvoltage protection, SafeSlot reinforcement, and a stainless-steel back I/O panel. The ASUS Q-Design ecosystem includes M.2 Q-Latch, PCIe Q-Release, Q-DIMM, Q-LED Core diagnostics, and a pre-mounted I/O shield for tool-friendly assembly. Software bundled includes Armoury Crate (with Fan Xpert 4 with AI Cooling II and Aura Sync), ASUS DriverHub, TurboV Core, and ASUS CPU-Z. BIOS is 256Mb Flash ROM with UEFI AMI, supporting CrashFree BIOS 3, EZ Flash 3, and EZ Mode. For business and enterprise use, ASUS Control Center Express (ACCE) IT management software is supported alongside WOL by PME and PXE manageability. Verified Specifications: - Chipset: AMD X870 - Socket: AM5 (Ryzen 9000 / 8000 / 7000 series) - Form Factor: ATX, 12 x 9.6 in (30.5 x 24.4 cm) - Memory: 4x DDR5 DIMM, max 192GB, up to 8000+ MT/s (OC), dual-channel, ECC/non-ECC - Primary M.2 slot: PCIe 5.0 x4 (Ryzen 9000/7000) or PCIe 4.0 x4 (Ryzen 8000) - Additional M.2 slots: PCIe 4.0 x4 (x2), PCIe 3.0 x2 (x1) - SATA: 2x 6Gb/s - Primary PCIe slot: PCIe 5.0 x16 (Ryzen 9000/7000) or PCIe 4.0 x16 (Ryzen 8000) - Rear USB: 2x USB4 40Gbps Type-C, 1x USB 10Gbps Type-A, 3x USB 5Gbps Type-A, 4x USB 2.0 Type-A - Display: 1x HDMI 2.1 (4K@60Hz), 2x USB4 Type-C (DP 1.4a, 4K@60Hz) - Ethernet: Realtek 2.5Gb - Audio: Realtek 7.1 HD, 24-bit/192kHz - BIOS: 256Mb Flash ROM, UEFI AMI - ARGB: 3x Addressable Gen 2 headers - Warranty: 3 Years