I'm trying to run two graphics adapters on a D975XBX motherboard, with a
Core 2 Duo processor, on Win XP SP2, so I can run three monitors. I've
tried various graphics adapter combinations (both ATI and NVidia), but
am getting a conflict between them.
The problem may be related to sharing IRQ 16 between the two boards. If
I boot in safe mode, disable one of the graphics driver, reboot, and
reinstall the driver, the setup will sometimes run the three monitors
OK, but will then fail again on the next reboot.
Bios and all drivers are the latest versions.
Who is in charge of mediating IRQ conflicts? The operating system, the
graphics device drivers, or the BIOS?