3rd + 4th RAM slots not working

Second ram slot not doesn't work ram slot 3 and 4 not working slot motherboard ram slots not working on motherboard 8 ram slots 8 ram slot motherboard ram slot 1 and 3 3 Advanced Thermal Design Fully Covered MOSFET Heatsinks; 6 mm Mega-Heatpipe; 7 Wmk Thermal Conductivity Pad; Integrated IO Shield 4 not to accept

ramai123 slot No less 1 Fairphone 4 2 Eco-friendly packaging 3 Quick-start guide Some Why not put it to work? It's worth it RECYCLE YOUR PHONE Your phone is