The 845DC EVO comes in 3 capacities: 240, 480 and 960GB. We are primarily looking at the 960 version today. Regardless of the capacity, the 845DC specifies some blistering read performance. 87K IOPS is a huge number that puts Samsung at the top of almost every enterprise SSD list. Samsung did fix one of the wrongs of the SM843, which was the lack of power-loss protection. The 845DC should have a level of protection during power loss that SM843 lacked.