@whitequark In my experience it t gets tricky with more than 2. Source: I built multiple interposers in the last few years for Rowhammer research.
GitHub - mcsee-artifacts/ddr5-udimm-interposer-pcb: Our custom DDR5 UDIMM interposer with soldering points.
Our custom DDR5 UDIMM interposer with soldering points. - mcsee-artifacts/ddr5-udimm-interposer-pcb
GitHub (github.com)
GitHub - refault-artifacts/fault-injection-interposer: Hardware design files of the fault injection interposer used in REFault: A Fault Injection Platform for Rowhammer Research on DDR5 Memory.
Hardware design files of the fault injection interposer used in REFault: A Fault Injection Platform for Rowhammer Research on DDR5 Memory. - refault-artifacts/fault-injection-interposer
GitHub (github.com)