Does the B660 use DDR4 or DDR5?

B660 boards exist in both DDR4 and DDR5 versions — the chipset supports either, so check the specific board model before buying memory.

Not compatible

Is the Ryzen 5 5600 compatible with B660?

No — not compatible: Ryzen 5 5600 + B660. Socket mismatch: CPU is AM4, motherboard is LGA1700. Live eBay prices for both.

Spec

Ryzen 5 5600

B660

Socket

AM4

LGA1700

Peak power

76W

—

Memory

—

DDR4 or DDR5 (board variant)

Compare current listings across eBay and Amazon.

Ryzen 5 5600

B660

Socket mismatch: CPU is AM4, motherboard is LGA1700. The sockets differ, so the CPU will not fit this board.