Despite newer versions (NX 12, NX 2206, NX 2406), many companies retain for strategic reasons:
Primarily intended for legacy hardware and 32-bit operating systems like Windows XP or Vista. It is constrained by a theoretical limit of 4 GB of RAM, typically providing only 2–3 GB for the application. Siemens NX 8.5 32 bits 64 bits Docs -Multilanguage-