There are two ports available for M.2 PCIe. M.2_1 and M.2_2. _2 has the heat shield TURBO M.2. Is there a difference between the two? I've been using the M.2_1 port to connect the NVMe M.2 V-NAND SSD, as my main drive for system, programs, etc. Would I be better off using the TURBO M.2_2 for that? Would the heat shield serve a better purpose if used for another SSD? What is recommended for using separate drives?