Hot on the heels of Samsung updating its website with its next performance-segment SSD 860 Pro series , with its range-topping 4 TB variant, a similar pre-launch website update revealed the company's next mainstream SATA SSD, the 860 EVO. The drive will be available in three form-factors, 7 mm-thick 2.5-inch, M.2-2280, and mSATA; all with SATA 6 Gbps interface. The 2.5-inch version comes in 250 GB, 500 GB, 1 TB, 2 TB, and 4 TB variants; while the M.2-2280 version comes in just 500 GB, 1 TB, and 2 TB variants; and the mSATA version in 250 GB, 500 GB, and 1 TB variants. The drives combine Samsung's latest generation 3D VNAND flash memory built in the 10 nm-class sliicon fabrication process, with an updated controller and refined firmware.The 860 EVO offers sequential transfer rates of up to 550 MB/s, with up to 520 MB/s sequential writes, up to 97,000 IOPS 4K random reads, and up to 88,000 IOPS 4K random writes. The new-generation flash is rated for "8 times higher" endurance than the 850 EVO series; with up to 2,400 TBW. Samsung is reinforcing its faith in the drive by backing it with 5-year warranties. The company is introducing the new TurboWrite feature, which is a user-configurable SLC cache. You can set anywhere between 12 GB to 72 GB of the NAND flash to function as SLC, so the controller can juggle hot data in and out of it, for improved performance, using the Samsung Magician software.