Astonishing new-generation impeccable speed to unleash gaming performance.Read/Write: up to 12,400/11,800 MB/s The miraculous graphene boasts a perfect hexagonal honeycomb structure. The ultra-thin graphene heatsink can be complimentary to any original motherboard heatsink. Manufacturer Warranty: 5-year or TBW (Terabytes Written) limited warranty. Free Technical Support and Customer Service on TEAMGROUP's official website. The definition and conditions of TBW are based on the JEDEC standard.