Synology RAM DDR4-2666 Non-ECC SO-DIMM 4GB (D4NESO-2666-4G)

See my Headline

As stated, nothing more to add.

Yep. Its fast.

Works flawlessly with the DS 720+. The cost is high for RAM but using another unapproved modul will cause problems. For example; shut downs, data lose, clicking HDDs. Outright system crashes and random freezing.

Easy to install and works great on my Synology Server

I already purchase one years ago for my DS220 and this one its just as flawless. Will run non stop for years. In addition, you ensure that warranty and support is available since its approved by Synology (of course)

Four stars because of price, but other than that I have had no issues when using with DS220+. Rock solid

update: dec’21:

Easy installation

This was a great buy I caught a sale