Comment by nyrikki
I just gave up and built an AM4 system with a 3090 because I had 128G of ddr4 udimms on hand the whole build was for less than just the memory would have cost for an AM5/ddr5 build.
Really wish that I could replace my old skylake-x system but even ddr4 rdimms for an older xeon are crazy now let alone ddr5. Unfortunately I need slots for 3xTitan V's for the 7.450 TFLOPS each of FP64. Even the 5090 only does 1.637 TFLOPS for FP64, so just hopping that old system keeps running.
If you don't need full ieee-754 double precision, ozaki scheme (emulation with tensor cores) might do the trick. It's been added (just a little bit) to cublas recently.