<p>➀ The ASRock Rack EPYC4000D4U is an mATX motherboard designed for AMD's socket AM5 CPUs, bridging server-class features to compact builds with support for up to 192GB DDR5 ECC memory and PCIe Gen5 slots.</p><p>➀ It features an ASPEED AST2600 BMC for IPMI management, dual Intel i210-at NICs, and eliminates traditional chipsets by using ASMedia controllers for SATA ports, reducing power and cost and aligning with modern server designs.</p><p>➁ The motherboard prioritizes EPYC CPUs for server workloads (e.g., 170W liquid-cooled EPYC 4565P) but supports Ryzen CPUs, though with reduced PCIe Gen5 speed on M.2 slots for Ryzen 8000 series processors.</p>