Why doesn't this eyefinity setup work?

[sirgraystar]

Hi guys. So this is the situation:

I have an HD6770 - this card to be precise. So it's got DP, DVI and HDMI outputs. Rubbish card I know but I'm not a gamer, just a developer.

I have 3xDell U2412M monitors, they've got DP, DVI and VGA inputs.

Motherboard is Gigabyte Z87M-D3H with a 4670k in, brand new.

I can set up the monitors fine using both the iGPU and the 6770, but I can't get eyefinity working. I don't have a DP cable, I have an active DP->DVI adapter from a previous setup, but I don't think that should make a difference. The issue appears to lie with the HDMI, which I am using an HDMI->DVI adapter to convert. This doesn't appear to work in any config, even as the only display, so perhaps it's the cable (although it worked previously).

What I want to confirm before buying another HDMI->DVI cable is whether the above setup can do eyefinity, and whether there's a better solution to get to eyefinity nirvana than the HDMI->DVI cable route?

Just to avoid the obvious questions, all the monitors work fine, I've got the latest drivers installed, brand new installation of Windows 7 Ultimate x64.

 

[MeMeMeMe]

You haven't stated which 3 outputs you are using. List all 3, including all adaptors and cables, and which ports they are being plugged into on the monitors.

That said, if the HDMI output isn't working even on single display, that's clearly your problem. Either the port itself, the cable, or the HDM-> adaptor. One of those 3 is the culprit.

 

[Doomedspeed]

Don't you need an 'active' display port adapter?

 

[sirgraystar]

Sorry, to clarify:

There only are three outputs on the 6770: DP, HDMI and DVI. I have tried:

DP port: DP->DVI active adapter plugged into DVI port on monitor
HDMI port: HDMI->DVI cable plugged into DVI port on monitor
DVI port: DVI cable plugged into DVI port on monitor

The DP->DVI adapter is active.

 

[Diagro]

What sort of active adapter is it? Many max out at 1920 x 1080. Thus a usb powered expensive one is required

 

[sirgraystar]

At work currently so not 100% sure, but I think it's a HP FH973AA based on my googleing. It's certainly not usb powered though.