I'm just going by the Micron UDIMM data sheets. https://media-www.micron.com/-/media/client/global/documents/products/data-sheet/modules/unbuffered_dimm/ddr5/d

I'm just going by the Micron UDIMM data sheets. https://media-www.micron.com/-/media/client/global/documents/products/data-sheet/modules/unbuffered_dimm/ddr5/ddr5_udimm_core.pdf?rev=fdbd9476506c4e019360a5e402827caa https://media-www.micron.com/-/media/client/global/documents... Looking a bit closer I think you are right that it's 12V but only for Registered DIMMs.