flowchart TD subgraph PowerEntry[Power Entry] ATX24[ATX 24 pin input] DCJack[DC barrel input] Protect[Surge ESD OV OC protection] ORing[Ideal diode ORing] VIN12[VIN 12V main bus] ATX33[ATX 3.3V] ATX5[ATX 5V] end subgraph Compute[Compute and Memory] CPU[CPU socket placeholder] DDR[DDR slots up to 128GB] end subgraph PCIeFabric[PCIe Gen5 Fabric] GPU[PCIe x16 Gen5 slot] NIC[PCIe x4/x8 slot for NIC] SW[PCIe switch retimer placeholders] M2A[M.2 NVMe slot 1] M2B[M.2 NVMe slot 2] M2C[M.2 NVMe slot 3] M2D[M.2 NVMe slot 4] end subgraph Rails[VRM Rails] VCPU[CPU core VRM placeholder] VSOC[SoC VRM placeholder] VDDR[DDR VRM placeholder] V33[3.3V aux] V5[5V aux] VPCIE[PCIe slot power] end subgraph Expansion[Arduino Expansion] Arduino[Arduino header area] UART[UART] I2C[I2C] SPI[SPI] GPIO[GPIO] end subgraph Mech[Thermal and Mechanical] WB[Water block keepout] M2Therm[M.2 thermal zones] Mount[Mounting holes] end ATX24 --> Protect DCJack --> Protect Protect --> ORing ORing --> VIN12 VIN12 --> Rails ATX33 --> Rails ATX5 --> Rails Rails --> CPU Rails --> DDR CPU --> DDR CPU --> PCIeFabric SW --> GPU SW --> NIC SW --> M2A SW --> M2B SW --> M2C SW --> M2D CPU --> Arduino Arduino --> UART Arduino --> I2C Arduino --> SPI Arduino --> GPIO