Here's the situation:
I was running Vista 32-bit with 4GB of RAM installed (2GB first, then added 2GB later). Today I decided to install 64-bit Vista to utilize it all. So, the installation goes smoothly for the first part, but upon reboot I get a BSOD. A bit of research shows that Vista sometimes (or always?) BSODs if you try to install with more than 3GB of RAM installed. So, I removed 2GB of RAM and Vista installed fine. Once it was done installing, I put back in the other 2GB of RAM. On boot-up, I get one long beep from my motherboard (normal is one short beep) and no video display. However, as I have the 680i, the LED post code shows that everything is working fine. It sounds like it is booting up (lots of HD activity), but I have no display. So, I remove the 2GB of RAM again, but I still get the long beep and no video display. I remove one more stick, so now I only have 1 stick in the mobo. Then sometimes it will boot fine, other times I still have the problem. I double checked all connections, but I really don't think that's the issue as sometimes it boots fine with 1 stick of RAM, sometimes not. I've tried upping the voltage of the RAM, but that doesn't help. What is going on here?