ATI CrossFire Does Not Support On This Platform When Enabling (Ubuntu Lucid)

[krucifix85]

Any suggestions/ideas what might be wrong? If there is any additional information needed feel free to ask

Old thread I know, but two things I did to get my Crossfire to work were:
Disable IOMMU in BIOS (North Bridge settings, I think) and;
Change the Crossfire cable position on my 2 7970's - I first had it on the inner two connectors but then tried it on the outer connectors and my Crossfire settings started working (and saving after a reboot).

Hope that helps someone out there!

[tomtomme]

Old thread I know, but two things I did to get my Crossfire to work were:
Disable IOMMU in BIOS (North Bridge settings, I think) and;
Change the Crossfire cable position on my 2 7970's - I first had it on the inner two connectors but then tried it on the outer connectors and my Crossfire settings started working (and saving after a reboot).

Hope that helps someone out there!

interesting!
On which distro?
Which version of Catalyst?
Which games / apps did you test?
What is IOMMU?

[krucifix85]

interesting!
On which distro?
Which version of Catalyst?
Which games / apps did you test?
What is IOMMU?

Ubuntu 14.04
Catalyst 14.4
Witcher 2
http://en.wikipedia.org/wiki/IOMMU (I don't know myself, I just disabled it)

[krucifix85]

interesting!
On which distro?
Which version of Catalyst?
Which games / apps did you test?
What is IOMMU?

Ubuntu 14.04
14.4
Witcher 2

http://en.wikipedia.org/wiki/IOMMU