Yes, UDIMM RAM is designed to fit into DIMM slots.
Yes, UDIMM RAM is designed to fit into DIMM slots.
ECC is available for UDIMMs as well. These can also support ECC, while RDIMMs typically include it by default. Most consumer devices can use ECC UDIMMs, though they may not utilize it unless the motherboard and processor provide the necessary support. Some systems might not even display any changes.
You're referring to the bare ECC modules without any intermediate ECC chips. Those are straightforward low-profile options. The ones with an ECC chip in the middle are a different story—I'm unsure if they actually function properly, but I'm mainly concerned about the interface pins and hoping ECC reduces stress on the imc. This should help keep the PCB within limits and allow higher stable frequencies (expecting a PCB rating above 3200 MHz). However, these modules seem to fail to clock and cause random reboots during post setup. Maybe I should search for non-low-profile ECC sticks instead, or at least salvage the existing ones and move them to a better PCB. It might also help adding heat spreaders along with a stencil, as those usually perform better for high-speed clocks like DDR3 3400+ and stable frequencies above 2800 MHz.