This is a manual budget, not a live store-price comparison. Use the same currency and checkout treatment in both options.
Method and limits
Set a reused component to zero only after verifying that its generation, mounting, connections and software requirements fit the new platform. Add shipping, adapters and mounting kits to other required costs where applicable.
Formula: CPU + motherboard + memory + cooling + other costs for each option. Difference = option B minus option A. A positive difference means B costs more; it does not establish which performs better.
Gather exact SKU prices before using this result for a purchase. This calculation does not apply coupons, infer tax rules, or estimate a resale value for your old parts. Use the AM5 checklist and board documentation to resolve compatibility separately.