(And there's no way to get ECC memory with decent timings because DDR4 is binned to death, so even if you found some hypothetical Samsung B-die ECC SKUs they'd

(And there's no way to get ECC memory with decent timings because DDR4 is binned to death, so even if you found some hypothetical Samsung B-die ECC SKUs they'd be like 2333 or 2666 MHz and you'll never get them to work at 3200 or 3600 with timings better than 80-80-80-10000 or so. Meanwhile 3200CL14 or 3600CL16 is pretty usual without ECC. edit: On a second look, Mushkin will actually sell you 3200 CL14 ECC memory... 14-18-18-38 that is. At almost 10 quid on the gigabyte. Meanwhile you can get real CL14 non-ECC memory at around half that.