Guru3d has posted a picture of the new Eyefinity12 graphics card from Powercooler. This graphics card is based on the AMD Radeon HD 5970 graphics card, and sports 12 mini-DisplayPorts. The graphics card will take up 3 slots. A normal Radeon HD 5970 would come with 2 GB of GDDR5 memory. This new version has 4 GB of GDDR5 memory.
Remember that the Radeon HD 5970 is comprised of two Cypress graphics processors connected by a PCI-Express bridge. A normal Radeon HD 5970 has a core clock of 750 MHz and a memory clock of 1000 MHz. This is slower than Radeon HD 5870 with a core clock of 850 MHz and a memory clock of 1200 MHz.
While this is an interesting technological achievement, I do not think that we will see this sell very many units. The first problem is that not many people will be able to invest in 12 new monitors that support DisplayPort inputs. Not to mention that a 12 monitor wall is huge. Second, I am not sure how well it will perform with the latest games. Third, is that the bezels start to get in the way.
I do not think it is fair to call it Eyefinity 12. Eyefinity 2 x 6 would be more accurate. The current implementation of Eyefinity does not allow display groups to consist of monitors on different graphics processors. The Radeon HD 5970 uses 2 graphics processors, which is why Powercolor can offer 12 display ports, 6 per graphics processor. The best the Eyefinity 12 could do for a large display would be 2 groups of 2 x 3 monitors each. There would be no support for a 3 x 4 group, which seems to remove most advantages over using 2 Eyefinity 6 5870 cards.