Hmmm... Let's keep this thread alive just a little longer... 😉
Well, I may just have to do some more testing. I had two sticks of el cheapo PC-100 memory and I just bought a 3rd which was PC-133. I completely disassembled everything and put it in a new case, minus one stick of PC-100 to put in another computer. Low and behold, not only does everything work at first boot up, my computer runs perfectly at the CAS2 memory setting instead of the required CAS3 previously. (This is a big surprise to me considering that it never works properly the first time I assemble something, and I'm running all sorts of stuff, including 5 drives.) So, I wonder how much of my instability at superduper high speeds was memory related.
By the way, the Aopen HX08 is a nice roomy case and the slide out motherboard tray is nice. Definitely not perfect though. My old case is actually better designed, but it's only a 235 W mid-tower.