Mostly yeap. Every new memory stick I buy at home gets 30 minutes or so on memtest86. Professionally, it would be a couple of hours. Memory sticks might go "bad" over time, but I would bet it's likely a BGA ball failure. Possibly some directed heat or oven could fix it without having a BGA rework station. The failures-over-time graphs I've seen for memory are similar to those for hard drives: bathtub graphs.

My current build is a borosilicate water-cooled dual Rome EPYC with ½ a TiB of ECC RAM. I already had it planned before the media went gaga over AMD. I just hope prices don't spike too much before I drop what's already going to be $13k to get this done.

PS: 72-bit (64,8) SECDED ECC RDRAM typically uses 4-bit-wide chips in multiples of 18 chips (# = ranks, 36 for 2R), whereas consumer 64-bit DDR4 uses 8-bit chips, in multiples of 8 chips. Also, does anyone remember IBM's Chipkill?