My little brother just bought the 550 from newegg last week. One of the new batches, I forget what week it is, I'll find out tomorrow. But anyway he bought the Biostar TA790GXE 128M, not GX on accident. However I did some googling and found this...
Did you use the dvi output on the video card on bottom? (the one closer to the motherboard) I believe some of the older video cards only had dual link dvi-d on one port.
BTW newegg jacked up the price 50 bucks ><!
This is my setup:
Creative X-Fi Elite Pro
Coxial-> Pioneer Reciever-> Floorstanding speakers
Optical->Logitech 5500Z (Subwoofer is the only speaker connected)
The Floorstanding speakers give me enough bass but whenever i feel like shaking the house I turn on the sub.
dang! now they need one for the G7. I would love it if they could make the mx1000 with the G line's laser engine. MX1000 is a bit slower, really needs the precision of the G line.