I have an Amilo Pi1556 and some time ago, the pre-installed nVidia go7600 died.
I replaced it with a Quadro FX 770M and everything is working perfect except DVI output.
At the beginning I thought the problem was the bios and I changed it to Alienware 2.06W
No luck. I kept it though because the Quadro is operating at a little lower teperatures.
When im pressing FN+F4 the screen blinks but unfortunately no signal from DVI out !
Also another thing I don't undestand, is that when I'm connecting the laptop with HDTV
via DVI, I can pull out the EDID info from HDTV !!!
I'm using Windows 7 32 bit
nvidia Driver version 285.62
nVidia vBios version 62.94.3B.00.06