their non-pro drives used to be just "830" or "840" previously and classed as "consumer grade" but still MLC. then they came out with the less durable TLC (EVO

their non-pro drives used to be just "830" or "840" previously and classed as "consumer grade" but still MLC. then they came out with the less durable TLC (EVO) and killed off non-pro MLC drives, re-branding the inferior EVO as the consumer drive. they also make SLC (enterprise) drives.