I doubt that changing RAM will change the CID, since RAM is nothing essential to licensing.
Production: NX10.0.3, VERICUT 8.0, FBM, MRL 3.1.4 | TcUA 10.1 MP7 Patch 0 (10.1.7.0) | TcVis 10.1
Development: VB.NET, Tcl/Tk Testing: NX11.0 EAP, NX12.0 EAP
How to Get the Most from Your Signature in the Community
I've replaced ram without licensing issues.
Elmhirst Industries, Specializing in Prototype sheet metal stampings and assemblies
Production: NX 220.127.116.11 / Autoform r7 /WorkNC 2017 r2
PC: Rave Cadbeast: Intel(R) i7-4790K CPU @ 4.GHz /32gb ram /NVIDIA Quadro K2200 on Win10 Pro
The composite ID is just a combination of MAC-address and hostname.
It has nothing to do with the other hardware in the computer. just the network card.