At the risk of preaching to the choir...
I've read good reports about Optane memory and I've read a few that suggested it wasn't everything Intel was saying it was. I've read reviews at e-stores that were positive. Some e-store reviews were less than glowing and in practically every case the individual failed to properly read and execute installation instructions or they failed to understand what Optane memory was designed to do.
My extremely simplistic understanding is that Optane memory integrates with your large capacity disk hard drive to give it increased performance similar to a solid state drive at a reduced price. To illustrate this point I downloaded a few drive benchmarks and ran them on my system. I have two identical Western Digital Black SATA III 6Gb/s hard drives. One is integrated with my Optane module and the other is for storage/backup. Nothing scientific or highly technical here; just a couple of benchmarks ran in default mode. See attachments for details.
I think these results indicate that Optane does exactly what it's supposed to do.
Thanks, Intel, for a great product.
My system: i7-7700 on a Gigabyte GA-Z270-HDP3, 16Gb G.Skill DDR4 3200 memory and the two WD HDs.