Row 1 (leftmost): .. [GND] [VDD] [DATA] ... Row 2: [CLK] [VDD_SOC] ... ... (center area empty for capacitors) Row ~31 (rightmost): [SATA] [USB] [GND] ...
AM4 socket Pin Grid Array (PGA) layout with 1,331 pins . Unlike newer AM5 or Intel LGA sockets, the pins are located on the underside of the processor itself rather than the motherboard socket. TechPowerUp Key Technical Specifications Pin Count: 1,331 pins (a significant increase from AM3+'s 942 pins). Dimensions: The package is square, measuring 40mm x 40mm These pins are finer and more fragile am4 pin layout
One of the significant advantages of the AM4 socket has been AMD's commitment to upgradability. Despite the introduction of new processor generations, many AM4 motherboards have received BIOS updates to support later Ryzen series processors, enhancing the socket's longevity. Row 1 (leftmost):
Because of these cutouts, the CPU can only be inserted into the socket in one orientation. Unlike newer AM5 or Intel LGA sockets, the
Supports up to 24 PCIe lanes (PCIe 3.0/4.0 depending on the CPU generation).
The Engineering of Connectivity: Understanding the AM4 Pin Layout
| Feature | AM4 (PGA) | AM5 (LGA) | |---------|-----------|-----------| | Pin count | 1331 | 1718 | | CPU pins | On CPU | On motherboard | | Bent pin risk | High (CPU) | Moderate (socket) | | Max current | ~150A | ~230A | | Memory | DDR4 only | DDR5 only |