Samsung 840 EVO -Series MZ-7TE500BW 500GB 2.5" SATA III Internal SSD Single Unit Version. Sequential Read Speed: 540MB/s, Sequential Write Speed: 520MB/s, 98K Random Read Speed: 86,000 IOPS, 90K Random Write Speed: 32,000 IOPS, Trim Support, Y Raid Support, Samsung MEX Controller, 1y nm Triple Level Ccell (TLC) Toggle NAND 2.0