You would require an asset management/monitor software rather than the in-built asset discovery within Web Help Desk.
Once done, you could then link up the tool with the help desk and sync the data; including RAM.
Please share with us what Solarwinds tool you are using, and an example of an asset from which you want the amount of RAM displayed in the output of the tool. Perhaps then we'll have an answer that will fill your needs.
Sorry! Im just now seeing this! I'm using web help desk! I've gotten the amount of RAM to show up under "Linked Peripherals" but need to figure out how to search thru my assets by this.