stinger608 just messaged me and told me about this thread. Wow, I'm loving this stuff! I got into computers when my dad bought his first 486, which I still have around and is currently hooked up. Then I ran a super socket 7 and a socket 370 system for years, I think I ran Win98 till 2006! I didn't even have an XP system till I built my first gaming rig, which then a year later Vista came out. Then I went back and "maxed out" the socket 7 and 370, and both of them are still running. Mainly I just always wanted these rigs to fly back when I first used them, and now they do. When I get a chance I'll get some pictures and go a lot deeper into specs and stuff. I can tell you guys this though: Those modern PCI nvidia cards, like ZOTAC ZT-60604-10L GeForce GT 610 512MB 64-bit DDR... will work on boards as old as socket 7 (you just need a pci 2.3 slot I believe and an OS for the drivers). But ideally you'll want to go no older than socket 370, cause you'll want the SSE instructions on the CPU (pentium III is the oldest to have this). So for a system with a AMD k6 (no SSE), you won't be able to run anything 3d- the drivers bluescreen. Modern ATI/AMD cards, in my experience, won't go on anything older than a socket 370. And for OS, WinXP will run on socket 7 if you have at least 512 ram. Vista and Win7 will run on socket 370/Pentium III rigs, only you probably won't like it. Win8 WANTS SSE2, so I wouldn't bother, however I did get it running on a socket 370 but it crashed every so often. So I use Fedora 19 i686 instead, and it works pretty well. For older systems, I use the fanmade "Unofficial Windows 98 SE Service Pack" or ^That. I have gotten Damn Small Linux to boot and run on a 486 with 16mb ram (I later maxed it out to 36mb). These older rigs though have shoddy old cd-rom drives that have trouble running live cds, so I'd replace them first to make installation quicker and less error prone. There's also: https://en.wikipedia.org/wiki/Tiny_Core_Linux which seems to be more frequently worked on.