I have a T7920, and according to the Tower Technical Guidebook, available to download from Dell, the T7920 requires RDIMM ECC RAM. Below is an excerpt from a tech article on NVDIMM
Disadvantages of using NVDIMMs
NVDIMMs aren't always a direct replacement for DRAM technology; the application architecture must be adapted to NVDIMM features. In some cases, it might be necessary to modify software programming and hardware BIOS or UEFI to support NVDIMMs.
mazzinia_
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Posted January 29th, 2026 02:12
Intel Optane ram will work ( with the correct amount of normal ram as cache ), but that's all that can be said to be tested.