Hi I have two VGA monitors, my GPU is ATI PowerColor 6850 which has two DVI slots, I use adapters for both VGA monitors. If I connect any the two monitors in the first slot it will work right away (along the plugin confirmation sound). And if I connect any of both monitors to the second slot I won't get anything, nor a signal or confirmation sound.
I also tried auto detecting via Catalyst Control Center and Windows Desktop Resolution.
I have the latest drivers installed.
EDIT: I found this on the Spec Description:
Display Connectors DL-DVI-I/SL-DVI-D
And in NewEgg:
2 x DVI (1 Single Link, 1 Dual Link)
Could this have anything to do with my issue?
Best Answer
Display Connectors DL-DVI-I/SL-DVI-DTHATS your problem
There's three types of DVI connections (well 5, in theory but bear with me).
DVI-D is purely Digital, DVI-A is standard bog standard VGA with a different pin out, and DVI-I is a mix of both. For DVI-I and D you also have single link and dual link, which is irrelevant to the question - it determines maximum resolution.
DVI-I includes analog pins. DVI-D dosen't. As such a passive DVI->VGA adaptor (which is what i mostly see, and is a DVI-A -> VGA converter which you mostly connect to a DVI-I connector) won't work on DVI-D since you're connecting to pins that aren't there
Annoyingly, DVI-D is supposed to have a different pin out just so that you couldn't put a passive adaptor in and find that it dosen't work. The wikipedia article also goes in depth into all this.
In theory you should just use DVI if possible for the second monitor or find an active converter that converts DVI-D to VGA, rather than passes through DVI-A connections to a VGA connector.