Most likely AMD will replace your processor if defective.
So you now will have 2 processors to use. You can either use the 3600 as a emergency Backup or you can sell it on ebay or Amazon or some other similar Retail site or give it away as a gift to a family or friend or use it to build a second PC with it.
Note: The AMD Warranty is only good for the original owner so if you sell the processor or give it away they won't be covered by the AMD Warranty anymore.