The former 486 case has been cleaned, retrobrited and repopulated with a Pentium MMX 166, with an awesome Weyland/Yutani Aliens reference sticker by Geekenspiel! The 486 system has been moved into the
i486 - Wikipedia
A look at a 486 PC wanna-be - YouTube
The Ultimate mid-90s DOS / 486 DX2 66 MHz Gaming Computer - YouTube