It will error with "Missing required entry point GetSystemFirmwareTable in KERNEL32.dll" or simply refuse to start. Windows 98 is fundamentally incompatible.

This is a conceptual guide, as . The earliest OS supported by GPU-Z is Windows 2000 (and primarily Windows XP and later). Windows 98 lacks the necessary kernel APIs (like WMI, proper PCIe enumeration, and modern driver models).