For how much DRAM in your 3,1? 32GB? @AidenShaw stated that it was a box with 72c/144t and 1.5 TB of DRAM, which is 48x as much DRAM and 48-32GB DIMMS, which is probably 12x as many DIMMs as you have in your system. When stuff breaks on enterprise equipment and it can, no matter how much you seem to research, justify, research more and end up getting budget for, when it does, it's a headache to track down. At least with ECC, you have a chance...it always helps if the DIMM slot has a fault LED next to it, but I digress.
Also, if you're *really* hammering the ram with constant read/writes you're going to hit a lot more errors than in relatively casual use.