And that is proof high-density sticks don't work? Or is it proof that those sticks, to that amount, makes booting
difficult in your system? Meaning, I don't think anything much - but for some beeping - would happen if it didn't support high-density chips ==> No POST. Whoever inside your system does the counting, she sees the full amount.
What I wonder more about is the FSB of 133(266) for PC2100 memory. What processor do you have, and what temp.? Do things work if you load BIOS Fail-Safe Defaults?