Awesome, another SoftPerfect user! Yes, that's seem way faster then SSD, imagine experiencing PCIE-5 or 6 speed before PCIE-5 or 6 SSD existed with a bonus of reducing the SSD wear and tear. 64GB of RAM is quite good amount of memory, in fact, you should be able to run the entire Windows OS in RAM and still have room for a second RAMdisk while leaving the rest for normal RAM usage. All you would need is a 25GB RAMdisk for the OS, using a 25GB VHD file.
If you're interested, a driver called
svbus and a
github of the same driver. Sadly the driver seems to have cease development, and don't know if it will work in Windows 11, but according to the site, it does. The downside, this driver is slow and is slower then SSD, but with the combination of SoftPerfect RAMDisk, I think makes up for it. Keep in mind that I find that after around 6 month, explorer.exe, the icons near the clock seems wonky and don't know why it does that. You can simply boot into VHD as file disk and restart as RAMdisk and that seems to solve the issue, or task kill explorer.exe and then relaunch it.
Edit:
You may even be able to go lower for RAMdisk space for the OS.