I've just upgraded an old computer from XP to windows 7. It runs a dual-monitor setup, which was all fine under XP.
I have an onboard Geforce 8300 and an ati radeon 7000. Only one of them seems to be active at any one time. I can switch which one is active in the BIOS (I can't remember what option it was, but possible values were PCI/PCI-E/Onboard), and windows can see that 2 graphics cards are there, but will only let me use one, with the remaining monitor staying on stand-by.
All drivers are up-to-date, and my googling is coming up with very little of note. Anyone know what's going on?