SSD speeds have continued to skyrocket with PCIe Gen 4 and Gen 5, and with it, so have their thermal demands. M.2 drives may be tiny, but they can run surprisingly hot under load, especially in compact cases or poorly ventilated spots on your motherboard. Without a heatsink, many of these drives will throttle down, lose consistency, or even wear out faster than expected. That’s when an M.2 drive heatsink goes from an optional add-on to something that can make a big difference.