Since the arrival of the XP941 last year, and later on the SM951 NVMe, we have been waiting for a more affordable mainstream version. Recently Samsung delivered just that with its new SSD 950 Pro Series. Made exclusively in the M.2 2280 form factor, the new 950 series comes in either 256GB or 512GB capacities -- priced at $190 ($0.74/GB) and $350 ($0.68/GB), respectively.