The following are the minimum RAM requirements for this server: 512 MB and 2 GB for Window Servers that have the Desktop Experience feature.
How much RAM does Windows Server 2019 use?
The following are the estimated RAM requirements for this product: Minimum: 512 MB (2 GB for Server with Desktop Experience installation option) ECC (Error Correcting Code) type or similar technology, for physical host deployments.
How much RAM is good for a server?
OS Requirements: A good rule of thumb is to reserve 1 GB of RAM for the OS by default, plus an additional 1 GB for each 4 GB between 4-16 and another 1 GB for every 8 GB installed above 16 GB. What this looks like in a server with 32 GB RAM is 7 GB for your OS, with the remaining 25 GB dedicated to your SQL Server.