Corsair Vengeance LPX DDR4 2x8GB one stick not working

Name: Corsair Vengeance LPX DDR4 2x8GB one stick not working
SKU: M_9jsx5WQnJnIDgrIfFsL
Price: 20 USD
Availability: InStock

Corsair Vengeance LPX DDR4 2x8GB one stick not working. Not sure what’s wrong