AM4 PGA (Pin Grid Array) socket uses 1331 pins. The socket, as pictured above, features a PGA (Pin Grid Array) design. It is clearly labelled 'Socket AM4' and there are 1331 pins present ? a significant increase on the 942 pins supported by AMD's AM3+ socket. (For further comparison Intel's current LGA 1151 sports 1151 pins.)

As a reminder, AMD Socket AM4 is designed to support the currently shipping 7th Generation AMD A-Series ('Bristol Ridge') desktop PC systems and the upcoming Zen-Series ('Summit Ridge') processors. The beefed up number of pin connections will likely be used for the platform's new dual channel DDR4 (up-to 3200MHz) memory configuration, support for up to 24 PCIe lanes, and the integrated Northbridge in upcoming processors.