I have a lenovo P52, it came with 16 GB ECC. The dimm is not super-expensive, but it's hard to find, and only comes in half the size of regular dimms. I replac

I have a lenovo P52, it came with 16 GB ECC. The dimm is not super-expensive, but it's hard to find, and only comes in half the size of regular dimms. I replaced it with non-ECC memory and never had an issue. In fact you can combine ECC and non-ECC memory without any problem.