These are either rack-mounted or PCIe drives. If I look at the chart on that page, then the C300 is the fastest 2.5 inch SATA drive. I.e. its the fastest drive

These are either rack-mounted or PCIe drives. If I look at the chart on that page, then the C300 is the fastest 2.5 inch SATA drive. I.e. its the fastest drive that can practically be added to a laptop.