Before the comprehensive GitHub resources emerged, the Reddit community, led by users like u/cole_8888 , worked to create a pinout diagram from leaks and community-driven discovery. This grassroots effort resulted in several valuable resources:
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Since a 1331-pin grid is too large for print text, here is the exclusive "Zone Map" (Motherboard top-down view, notch at the top).
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| Pin Range | Primary Function | |-----------|------------------| | A1–A40, B1–B40 | DDR4 memory channels A & B | | C1–C40, D1–D40 | DDR4 memory channels C & D (if populated) | | E1–H40 | PCIe lanes (x16 GPU + x4 chipset) | | J1–N40 | SATA, USB 2.0/3.0, PCIe from chipset | | P1–T40 | Power delivery (VDD, VDDCR_CPU, VDD_SOC) | | U1–AE40 | Ground (VSS), SMbus, clock, reset, PROCHOT, SVI2 power management |
A1 VDD_33 | B1 PCIe_TX0P (M.2) | C1 PCIe_RX4N | D1 PEG_TX0P | E1 VDD_18 A2 VDD_33 | B2 PCIe_TX0N | C2 PCIe_RX4P | D2 PEG_TX0N | E2 VDD_18 ... A10 VSS | B10 VDD_CORE | C10 VDD_SOC | D10 PEG_RX8N | E10 VSS ... A31 PCIe_RX0P | B31 PCIe_TX0P (FCH) | C31 CLKREQ# | D31 LCLK | E31 RESET# A32 SPKR | B32 SVI2_SCLK | C32 JTAG_TCK | D32 CLKOUT_14 | E32 PROCHOT# ...
Manage clock enables (CKE), chip selects (CS), and write enables (WE) to sync data transfers. 3. Signal Integrity and Pin Placement Strategy If you share with third parties, their policies apply
Positioned directly under the gold triangle corner indicator. Critical Repair and Continuity Guidelines
A significant portion of the pins are redundant ground (VSS) or power (VDDCR_CPU/SOC) pins to ensure stable voltage even under heavy overclocking.
When utilizing an AM4 Pinout Diagram for repairs—such as those described in MSI motherboard repair videos —be aware of the following: Since a 1331-pin grid is too large for
Unlike older architectures, the AM4 processor acts as a System on a Chip (SoC), integrating what was once the Northbridge directly onto the CPU.
We are mapping the – the holes that receive the CPU pins.
⚠️ Full 1331-pin grid is proprietary to AMD. Public diagrams show only functional groupings. For motherboard repair, use vendor-specific board schematics. For pin-level multimeter testing, the SVI2 power pins (R7, R8) and VBOOT (pin S6) are the most useful for no-boot diagnosis.
Audio interfaces, USB signals, clock inputs, and sensing pins. Technical Analysis of Power and Data Pins 1. Power Delivery Network (PDN)
Powers the System-on-Chip elements, including the integrated memory controller, PCIe controllers, and internal graphics (on APUs).