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AMD Eyefinity problems

We are using AMD Eyefinity 6 graphics cards to drive 2-6 displays with one card. The last display will not configure properly (no graphics). How can this be fixed?

There are a few typical reasons for this.

  • To support multiple monitors you should only use active DisplayPort->DVI adapters, passive adapters can cause problems with the graphics drivers. AMD maintains a list of approved adapters at http://support.amd.com/us/eyefinity/Pages/eyefinity-dongles.aspx. The desired adapter type is "Mini DisplayPort to DVI, single-link, active".
  • Even with active adapters there can be issues if any of the adapters is broken. If one adapter is broken it can cause problems in another display, in a rather unpredictable way.
  • The AMD Eyefinity drivers sometimes have quality problems, and sometimes newer drivers are worse than the older drivers. Therefore one might need to test different drivers before finding one that would work in a given combination.

We configured AMD Eyefinity display setup correctly, using Windows. Then someone unplugged one of the cables (or rebooted the computer), and the whole configuration was lost. Redoing the setup takes 30 minutes. What can we do to avoid this?

You can use the Catalyst Control Center to save your configuration profile. You can find more on the AMD support pages. Another way to work around this problem is to create a "recovery point" with your Windows installation when the display setup is working correctly. When the display setup breaks, you can roll back to the recovery point, and the display setup should be fine again.

When configuring multiple displays, they are showing in lower resolution. Is there a trick to fix this?

This seems to be an issue with some versions of the AMD Eyefinity drivers. Sometimes the Catalyst Control Center doesn't work properly and the resolution can only be changed using Windows display manager. Right click on desktop, choose Screen Resolution and from there, choose desired resolution.

Big latency

There is a lot of latency between hand movement, and its effect on the screen. I am using Windows 7, 64-bits. How to fix this?

This is a rare bug, and the exact cause for it is not known. Running DPC Latency Checker 2.0 seems to solve this problem, at least for the known cases. Based on information on the DPC web site the latency problems are probably caused by faulty device drivers. Any misbehaving device driver (display, USB, network, Firewire...) may introduce extra latency for the whole system.