To keep the consumer happy manufacturers try to offer drives at various performance and pricing levels, and Mushkin is no different. The graphic below sort of sums up the main M.2 drives in the current lineup. As you can see, the GAMMA is the top-performing drive and it comes in three capacities - 1TB, 2TB, and 4TB. The 2TB version is what we have today. It is a PCIe Gen4 NVMe SSD and, although it will work on a PCIe Gen3 system, to get the maximum speed and performance, you need to use it on a PCIe Gen4 system. No worries - Gen4 capable motherboards are slowly making their way into the wild.