Quote: Originally Posted by sygnus21
Not sure what that's about but you should certainly be able to use other cards in those slots and Windows will pick it up if a driver is supplied.
As you see in my system I have a Creative X-FI soundcard plugged into the PCIE slot at the bottom. I have an Intel board. Maybe AMD boards work differently? Don't think so, but....
Anyway you need to read the owner's manual for your motherboard to see what it says about using those slots.
Thanks for the advice.
1) the system does recognize the card and has a driver for both Marvel 91xx SATA 6G controller and for USB (see attached devices.png)
2) The mobo manual list "Other PCIe devices (X8, x4, x1)" under non-SLI mode
3) The problem is that I cannot use my second monitor in this configuration (i.e. under Windows 7 64 ultimate SP1; the same setup will work under XP 32bits)
4) have to admit that my old mobo is not on the U3S6 compatiblity list (see e.g. Asus U3S6 USB3.0 weird quirks - Other-Components - CPU-Components
however, it evidently is compatible enough to work...
So, I'm not prepared to give up yet and still believe it is a Windows 7/driver issue. I don't suspect the nvidia driver terribly, since a similar driver will work under xp. But I did post on Nvidia as well, no luck so far.