Oh crap... I just read that using the power supply adapter disables the ADC thing. I use an Nvidia card with a DVI and an ADC port. I actually don't use Apple displays, I have an ADC-DVI adapter so I can connect 2x regular DVI monitors. I'm not sure if that means that the ADC port won't work at all or what, but it looks like I'll need a new Nvidia card with 2x DVI outs. I forget which cards for Powermacs have that.

My current MDD is way too loud. There's this weird whirring noise and I have no idea where it comes from, but it's not the power supply or the big fan pointing on the DVD drives since I replaced all of those already. My video card has no fans either, so the noise is probably either something internal on the power supply or it's the CPU heatsink fan.

I imagine if I can get the power supply replaced and get those CPU fans removed and replace with something, the QS or MDD would be just about dead silent.