A few days ago, a Reddit user came onto one of AMD's support pages and found some pretty disturbing information regarding the use of aftermarket cooling solutions. According to the FAQ, users are voiding the warranty on their AMD processors if they don't use the included stock heatsink. Given the seriousness of the situation, the matter was immediately brought to AMD for clarification. In their defense, they have stated that the information in the FAQ is outdated, and the wording doesn't accurately describe the terms of the warranty with modern processors. Therefore, AMD got right on the task and has since updated the FAQ. To not make a short story long, users are free to use aftermarket CPU coolers as long as these heatsinks are capable of properly cooling the processor within AMD's TDP specifications.
View at TechPowerUp Main Site
View at TechPowerUp Main Site