What is the best RAM configuration for a Ryzen 7 7800X3D?

32GB of DDR5 at 6000MHz with decent timings is the correct choice. The 3D V-Cache makes memory speed less of a bottleneck, and 6000MHz matches the Infinity Fabric clock in a 1:1 ratio without headaches. 64GB won’t help gaming, and future-proofing is a waste since DDR5 will get faster and cheaper.