memory - RAM compatibility for the HP Proliant DL320e Gen8 v2

I've got a handful of servers to assemble. I've got a few HP Proliant DL320e Gen8 V2 servers with the 2 LFF hard drive slots and 4 RAM slots.

It came with a stick of PC3 12800E 11-13-E3 RAM, and I'm not sure what those last couple of things are supposed to designate, if anything.

I checked the PDF and it doesn't seem to detail whether or not I need to use HPE SmartMemory or I can use any old UDIMM sticks, just that it supports up to 32GB for 8GBx4 config.

Can I use any kind of RAM? The only hard requirement is that it seems to need ECC. Can it be any brand? I'm not sure, and I can't seem to find a solid answer in the product's online-available documentation in its PDF or online memory configurator. Near the end of the PDF it shows some HPE-provided RAM options that are all ECC. The wording for rules and guidelines obfuscates this more without detailing if using their specific memory is a guideline or a rule.

I need to know if using HP/HPE SmartMemory is an actual hard requirement, or just a best practice. I appreciate your advice, but I'm looking for an answer, not an opinion.

Standard Memory Plus Optional Memory Up to 32 GB memory is available with the optional installation of 4 x 8GB PC3-12800E UDIMM ECC DDR3 UDIMM Memory kits, operating at 1600MHz when fully populated at 2 DIMMs per Channel in 4 slots. NOTE: The below chart does not represent all possible memory configurations. NOTE: For best performance, it is recommended that customer installs memory in identical pairs

General Memory Population Rules and Guidelines:

• The HPE ProLiant DL320e Gen8v2Server has four memory slots

• There are two channels per server with two DIMM slot per channel

• Memory channel A consists of the two (2) DIMMs that are closest to the
processor
• Memory channel B consists of the two (2) DIMMs that are furthest from the
processor

• Different types of processors have different types of memory support.

• Support for single/dual-rank 1333/1600 MT/s ECC UDIMM (unbuffered DIMMS)

• The server supports up to 32 GB (4 x 8-GB) for Unbuffered DIMMs

• No support for RDIMMs; Non-ECC UDIMMs

• Do not install DIMMs if the processor is not installed

• Populate DIMMs from heaviest load (double-rank) to lightest load (single-rank)

• Always use HPE qualified DIMM