The Toshiba OCZ RC100 is one of the most affordable M.2 NVMe drives on the market. It comes in a super compact form factor, barely half as long as normal M.2 drives. RC100 is also highly integrated, using a single IC that combines SSD controller and NAND flash, but lacks DRAM.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips