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
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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
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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.