I have FirePro2460 with 3 Dell 2007FP (1600x1200) DVI monitors, using 3 passive DP to DVI adapters.
This worked fine under Windows 7.
Under Windows 10, it does not work at all:
1) Boot with ONE monitor plugged in: all is good.
2) As above, but plug in 2nd monitor AFTER boot: all is good.
3) Boot with TWO monitors plugged in: two monitors powered on, but always blank. Machine boots fine (I can rdp into it), but screens are always blank.
4) 3rd monitor: NEVER works at all - stuck in powersave mode, despite being recognized in DeviceManager.
Tried latest drivers (Aug3/2015) - no go.
I have TWO machines with the same config, and BOTH suffer the same symptoms.
Does ANYONE have 3 or 4 monitors working under Windows 10 with a 2460 ???