Samsung has just launched the 950 Pro, its first consumer SSD that puts vertical NAND (V-NAND) tech into a gumstick-sized M.2 PCI Express device. The result, as you might guess, is speed. The 512GB model, which costs a reasonable $350, can read at 2.5GB/s and write at 1.5GB/s, easily beating the company's last speed champ, the SM951 SSD. It's also Samsung's first mainstream drive to use NVMe (Non-Volatile Memory Express), an interface designed specifically for SSDs to help them sip less power and last longer. As a result, the 512GB model is warrantied to write up to 400TB of data. The drives use Samsung's 2nd-generation 32-layer V-NAND, not the 48-layer chips it recently announced.