My system is old, I know.
MSI Neo2 Nforce3 + HD4650 Radeon AGP + 2 GB mem + AMD Athlon 3000+
However, I wanted to try Windows 8.1 Enterprise Evaluation for it and was able to install it successfully with 32 bit version (64 bit didn't work). I installed Radeon legacy AGP Hotfix 12.6 drivers...