Even if you found a working key today (which you won’t), the software is nearly a decade old. It has known driver conflicts with Windows 11 22H2+ and lacks support for DDR5 memory subtimings.
software, specifically in the context of Windows 11 compatibility. Overview of Radeon RAMDisk AMD Radeon RAMDisk is a rebranded version of Dataram RAMDisk Radeon Ramdisk License Key 11