Even though Samsung is yet to make the 4TB 850 EVO SSD official, it is now on sale in the US for a price tag of $1,499 at adorama.com.
The 4TB 850 EVO drive uses 3D TLC (3 bit) V-NAND flash and is capable of hitting maximum sequential read and write speeds of 540 and 520 MB/s, respectively. Random read and random write speeds go up to 98,000 and 90,000 IOPS, respectively. As for the controller, it uses a similar MHX controller to the one used on the 2TB model.
Samsung lists the 4TB 850 EVO drive as having an endurance rating of 300 TBW, which is actually identical to the 2TB model. As far as power consumption goes, the drive is claimed to draw a maximum of 3.1W for read and 3.6W for write operations. At idle, it draws a mere 70mW, while in Device Sleep Mode, that number goes down to 10mW.