This is my go-to MS-DOS/Windows 9x machine. I got the case years ago back around the early 2010s. It had the same ASUS P5A motherboard, but one with REV 1.06 and an AMD K6-2 non-plus CPU. I have since sold off the REV 1.06 in exchange for a REV 1.04 motherboard, the latter of which the machine itself is currently housing right now. Reason being, ever since watching philscomputerlab's videos covering the AMD K6 Plus series of processors, I didn't even realize the flexibility of it and that really piqued my interest.
Unfortunately, upon further research, the REV 1.06 board was not compatible with the K6 Plus CPUs at their fullest potential. So naturally, I was lucky to find a REV 1.04 board on eBay at a reasonable price and sold off the REV 1.06 board as a result. At this point, I was super excited to finally have a solution to handle any DOS game that I can throw at it without worrying about setting up one too many computers just to do that.
The back of the AMD K6 build
The downside of course is certain weird CGA games that won't run on it properly, especially those that use the 160x100 16 color mode (i.e. Round 42), not to mention PCjr/Tandy compatible games that use its graphics as well as the 3 voice sound. Until I find a solution for both of those, I'll just stick with my PCjr or Tandy, as well as my IBM PC for those specific games, or I can just emulate it if I'm desperate enough. lol
The inside of the AMD K6 build
Regardless though, as much as I wish it could do everything in one box, I think the advantages outweigh the downsides well enough for me to get used to. The machine has since gone under many changes over the years and since this is a project box, I aim to make further changes once better resources come about. Because I do want this thing to operate better. Plus, I think this poor thing needs a better case, preferably an old school Lian Li if I can find one. But so far, it's doing a really good job at what it's supposed to do: Play DOS games as well as some speed sensitive Windows games that otherwise run like garbage on a Pentium III.